Presentation on theme: "THE BUSINESS CASE FOR IMPLEMENTING MACHINE VISION."— Presentation transcript:
THE BUSINESS CASE FOR IMPLEMENTING MACHINE VISION
Vision Systems International Established in 1984 Consultancy concentrating on machine vision Services include: Training Application related: Application engineering Specification writing Vendor identification/evaluation Market related Market research strategic development and planning partnering activities market analysis/competitive analysis due diligence Technology transfer
Introduction Electronic Imaging Where is Machine Vision Used Why Machine Vision Now Machine Vision Industry/Market Compared to Human Vision Why Consider Machine Vision Applications Systematic Deployment What is Machine Vision
Where is Machine Vision Being Used Machine Vision is in use in virtually all manufacturing industries In some industries one can no longer produce without machine vision
Why Machine Vision Now
Technology Readiness Underlying technology for machine vision has evolved Components developed with features required to succeed in machine vision applications Lighting - LED - stable, long life Cameras - solid state, progressive scan, asynchronous scan, exposure control, color, high resolution Optics - telecentric, computer controlled zoom Compute power - PCs, DSPs, etc. Software - GUI - Windows - Standard PCI Interface, IEEE 1394
Technology Pull Quality emphasis (ISO 9000, 6 sigma, etc.) Productivity gains sought/downsizing - eliminates eyes/requires substitute sensing Government regulations
Machine Vision Industry/Market Not homogenous Segmented supply side GPMV/IPBS ASMV VAR demand side by industry process end package end applications that cut across industries e.g. web scanners
GPMV Application Specific Modules PRINTING: INSPECTION, REGISTRATION CONTROL, COLOR CONTROL PHARMACEUTICAL: BLISTER PACK, VIAL/AMPULE, SOLID DOSAGES, OCR/OCV WELDING WEB PRODUCT OFF-LINE GAUGING MECH ASSY VERIFY CONSUMER PKG INSP FILLED CONTAINER: METAL, PLASTIC, GLASS, CLOSURES 2D LOCATION ANALYSIS ELEC. PKG. INSP: INSPECTION, QUALITY OF MARKINGS, CO-PLANARITY, BALL GRID ARRAY, OCR/OCV ELECTRICAL/ELECTRONIC CONN OCR/OCV 1D BAR CODES/2D BAR CODES/SYMBOLOGY EMPTY CAVITY INSPECTION COMPACT DISC APPLICATIONS CRT ELECTRONIC DISPLAYS DATA STORAGE
Semiconductor Processing Market Artwork Reticle/photomask inspection Unpatterned wafers - defects Patterned wafers: critical dimensions, overlay registration, defects In early majority phase but due to changes in industry also in innovator and early adopter phases
Semiconductor Packaging Market Alignment OCR/OCV Lead straightness Co-planarity Package markings Package cosmetics In late majority phase
Electronic Market Bareboard inspection Populated PCB inspection solder paste pre-solder post solder (optical and X-ray) In the case of bareboard systems - late majority In the case of populated PCB systems - early majority
Other Market Properties that Affect Adoption Geography Segment of market: consumer electronics, telecommunications, computers, military, etc. Captive manufacturer or merchant/contract builder
Automotive Market 3D sheet metal assembly spot welder fixture alignment wheel alignment paint inspection 2D - miscellaneous aftermarket head light aiming wheel alignment body alignment Major companies are in late majority phase; component suppliers in early majority phase
Wood Market Yield optimizer Grade optimizer Late majority phase for yield optimizer; innovator phase for grade optimizer
Printing Market Color registration Print registration Print inspection For first two in late majority phase; for third in early adopter phase
Container Market Glass glassware manufacturer filler Can Plastic Closure For glass and can in late majority phase; for plastic in early adopter phase; for closure in early majority phase
Pharmaceutical Market Process end vials, filled/unfilled solid dosages Packaging end label issues In process end in early adopter phase; in packaging in early/late majority phase
Three Dimensional Machine Vision Leading adopters: semiconductors - co-planarity electronic - solder paste, co-planarity transportation - gap/flushness wood - scanner/optimizers misc: OCMM, CAD input, welding, etc. Total No. Am. market - $248.8M, increased 9.1%
Compared to Human Vision Machine vision does not compare well! We use neurons to perform about operations per second 2 billion years of evolutionary programming
So Why Machine Vision? Humans only % effective!
People Attention span/distractions Eye response Relative gauging Availability (breaks, vacations, sick, etc.) Consistency individual between individuals from day-to-day
People Overload Boring Detect anomalies Adapt/make adjustments Interpret true nature of condition
Machine Vision vs. People Speed Accuracy Repeatability
Production Errors System Random
Machine Vision vs. Human Vision Machine vision: best for quantitative measurement of structured scene Human vision: best for qualitative interpretation of complex unstructured scene
Why machine vision works Because variables can be controlled parts can be presented consistently scene can be constrained
Generic Applications Inspection 2D, 3D Metrology surface flaw/cosmetic analysis mechanical/electronic assembly verification location analysis visual servoing (2D and 3D) robot guidance pattern recognition character recognition part recognition 2D symbol reading
Success Requires Senior management must foster atmosphere to encourage change support change agents demonstrate buy-in to change encourage plant and line to take ownership establish realistic schedule for changes
Success is more likely People assigned are interested in new techniques and welcome change begin with easy, non-critical application define the parameters of the project and avoid creeping expectations select applications not critical to labor issues be supportive during learning process plan for replications
Success is more likely Obtain people involvement Avoid technology leap that is too far Make certain project is part of an overall plan
Implementation Process Assemble task force and study production process task force should develop understanding of what machine vision is define need and evaluate alternatives investigate - select specific applications assess technical feasibility and cost feasibility write comprehensive specification
Implementation Process Install and run-in. Conduct acceptance test Provide shop floor support Evaluate systems performance against goals Look for another machine vision opportunity
Implementation Process Solicit vendors with appropriate expertise Visit vendors to review proposals, policies, expertise, QC procedures Systematically select vendor Purchase Acceptance test at vendor Train all personnel Involved
What is Machine Vision? As defined by the AIA: A system capable of acquiring one or more images, using an optical non-contact sensing device, capable of processing, analyzing and measuring various characteristics so decisions can be made.
Relevance of Pixels Pixels 512 X 512 1/4M 1300 X M AP Wire Photo 2.5M 35 mm color film 20.0M
Steps to Take When Buying a Machine Vision System
Identifying Machine Vision Opportunities Assess Application Feasibility Understand the Application Understand the Vendors Responsive Proposals Systematic Buy-off Procedure Mistakes in Buying Automation Project Justification
Identifying Machine Vision Opportunities Quality concerns Productivity/mechanization Process control Rework Inventory build-up - inspection bottleneck Equipment jams Warranty issues - field returns Employee turnover
Identifying Machine Vision Opportunities Lowest value added Expensive fixturing Lengthy set up times 100% inspection required to sort bad parts Hazardous environment Contaminants Capital expansion Operator limitations
Profile of Good Machine Vision Opportunity Perceived value Cost justifiable Recurring concern Can do something about it Straight forward Technically feasible
Profile of Good Machine Vision Opportunity User friendly potential Dedicated line Long line life Operation champion Management commitment
Global Competition Requires Higher manufacturing productivity Increased demand Higher product quality Better customer service Flexible manufacturing Greater return on manufacturing assets Changing standards of manufacturing performance
Computer Aided Inspection Provides traceability - records Statistical data base - isolate production problems Real time machine correction/adaptive control Automatic QC data collection and analysis Remove drudgery of humans
Hidden Costs Machine Vision Can Help Lost business because product not produced on time Shipment of wrong products Excess inventory Idle labor because parts are not available Doing a job over Loss of valuable information
Machine Vision and Factory Automation Data driven automation Machine vision = data !
Statistics Measurements Parts recognized Classification Types of defects Trend analysis Performance assessment Record keeping Process Control
Successful Application Requires Comprehensive understanding of needs Proper application process Good equipment and performance specifications Comprehensive understanding of machine vision system capability
Steps to Take When Buying a Machine Vision Machine Vision is in Widespread Use Best Justification is Process Control Infrastructure Resources: AIA and MVA
How To Select Machine Vision Equipment Understand the technology Assess application feasibility Understand the application Understand the vendors Responsive proposals Systematic buy-off procedure Applications in pharmaceuticals
Understand the technology
Steps to Take When Buying a Machine Vision System Become Informed Conferences Books Bibliography
Assess Application Feasibility
Steps to Take When Buying a Machine Vision System Assess Feasibility Basis rests with size of a pixel/FOV MVA slide rule Typical system handles 500 pixels Function of generic application : verification gauging part location flaw detection OCR/OCV/pattern recognition
Verification Function of contrast - real or artificial high contrast - feature should cover 3 X 3 pixel area low contrast - feature should cover more pixels
Gauging 500 marks on a ruler = resolution subpixel interpolation - factor of 4 to 10 requirements driven by tolerance rules of thumb: repeatability: 1/10th of tolerance accuracy: 1/10th to 1/20th of tolerance sum of accuracy + repeatability = 1/3 tolerance
Gauging Discrimination - smallest change in dimension detectable with measuring instrument Discrimination = sub-pixel resolution Repeatability = +/- Discrimination Accuracy - determined by measurement of calibration standard = Discrimination
Gauging - Example 2 part and 2 FOV tolerance: +/ , total range repeatability: 1/10 X or discrimination/accuracy: 1/20 X or with 500 X 500 pixel camera, resolution = with sub-pixel resolution 1/10, discrimination = = accuracy, so repeatability is =
Part Location Analogous to gauging Can expect to achieve sub-pixel resolution: repeatability and accuracy
Flaw Detection Contrast! Contrast! Contrast! Detection Vs. Classification Detection: High Contrast, normalized background (no pattern), can detect a flaw that covers 3 X 3 pixels Classification: flaw should cover 25 X 25 pixels
OCR/OCV Stroke width - 3 pixels wide Character should cover 25 X 25 pixels Spacing between characters - 2 pixels Single font style - bold Result % read rate effectiveness
Linear Array Image Capture pixels Scanning rates up to KHz Speed should be well regulated Resolution in direction of travel function of speed and sampling rate of camera
Understand the Application
Questions to Ask Before Proceeding From: Wayne Chaneski, Taking Steps to Improve Your Process, Modern Machine Shop, February, Can we eliminate the process? Does each step in the process add value? Is the step a duplication? Is the step a built in correction now unnecessary?
Questions to Ask Before Proceeding From: Wayne Chaneski, Taking Steps to Improve Your Process, Modern Machine Shop, February, Can we change the process? How can the operation be changed? Can different equipment make the operation better? Can we use less costly options? Can the operation be done faster? Can the operation frequency be reduced?
Questions to Ask Before Proceeding From: Wayne Chaneski, Taking Steps to Improve Your Process, Modern Machine Shop, February, Can we rearrange the process? Is it now the most efficient? Would changing the layout eliminate handling, transport, etc.? Is the operation sequenced properly? Can operations be performed in parallel?
Questions to Ask Before Proceeding From: Wayne Chaneski, Taking Steps to Improve Your Process, Modern Machine Shop, February, Can we combine steps in the process? Can suppliers perform some operations more effectively? Can customers perform some operations more effectively?
Questions to Ask Before Proceeding From: Wayne Chaneski, Taking Steps to Improve Your Process, Modern Machine Shop, February, Can we simplify the process? Are we taking full advantage of tooling/fixturing/material handling to assist operators? Are instructions easy to understand? Has all the information been made available, including helpful hints and pitfalls inherent in the process?
Questions to Ask Before Proceeding From: Wayne Chaneski, Taking Steps to Improve Your Process, Modern Machine Shop, February, Can we imagine the perfect process? What would it be? How much time would it take? Would we get a better yield rate? Could we ship products to our customers faster? How different is the perfect process? Can perfect process be documented - flow chart, etc.?
General Defect prevention is better than the cure! Study application site personally! Consider vision to enhance people! Expect productivity to decline!
Steps to Take When Buying a Machine Vision System application issues: generic application variables: part, presentation, etc. material handling operator interface machine interfaces environmental issues system reliability/availability miscellaneous: documentation, warranty, training, software, spares, service acceptance test/buy off procedure responsibilities
Tools Job descriptions Present specifications Part drawings Floor space drawings Samples Photos/videos Personnel
Steps to Take When Buying a Machine Vision System Write functional specification Use Machine Vision Requirements Checklist - available from MVA - forces examination of: production process justification issues application issues
System Spec Defines what system is and how system will work involves examination of implementation details programming standards style control methods
System Specification The spec is not what the customer wants! Creeping expectations! Variables - Gotchas!
System Specification Adhere to factory standards Adhere to engineering standards Use conventional jargon for part descriptions and to describe the process Use existing frames of reference to develop acceptance test
Before RFP Prepare preliminary conceptual design Develop schedule - be realistic Assess cost Determine technical and cost feasibility
Developing Functional Requirements What does the system do? What specific function do you want the MV value adder to do? What goals do you expect to achieve with MV? Will the MV system be for a retrofit or next generation product?
Developing Functional Requirements Defines what system is and how system will work involves examination of implementation details programming standards style control methods
Developing Functional Requirements Does the application involve: One object at a time Multiple objects How many different objects What are the part numbers? Is it a batch operation or continuous dedicated process? What are the changeover times and frequency of changeovers?
Developing Functional Requirements What are the skill levels involved in changeover? How is function currently being performed? Can new variations to the part be expected? What might they be? Where do parts come from? What is material handling surrounding MV?
Developing Functional Requirements Can rejected parts be repaired? Where do pass and fail objects go? When does the project have to be completed? How many shifts is the equipment used? If machine vision fails, what is the option?
Developing Functional Requirements How many MV systems will be required annually? What are the consequences of a failed MV sequence? What are the consequences of a false reject?
Developing Functional Requirements Describe the application Generically, does the application involve Gauging Assembly verification Flaw inspection Pattern recognition
Developing Functional Requirements If Gauging What are the tightest tolerances? What is the accuracy design goal? What is the repeatability design goal? Are there reference features? What are calibration requirements?
Developing Functional Requirements If assembly verification Dimensions of assembly Is it presence/absence Orientation verification What is the smallest piece to be verified and dimensions of that piece? Is part correctness also required?
Developing Functional Requirements If flaw inspection Describe flaw types What is the smallest size flaw? Does the flaw affect surface geometry? Does the flaw affect surface reflectance? Is it more of a stain? Is classification of flaws required?
Developing Functional Requirements If location analysis What is the design goal for accuracy? For repeatability? What is the area over which the find is required? Will angular as well as translation correction be required? Will scale change? Describe calibration requirements
Developing Functional Requirements If pattern recognition What is the size of the pattern? Describe difference between patterns? Is there a background pattern? Does pattern involve color? Geometry? Number of different patterns? Is objective to identify? To sort?
Developing Functional Requirements If specifically OCR/OCV Fixed font? Variable font? What is font? What is the height of the characters? What is the stroke width? What is spacing between and around characters? How many characters in string? How many lines? Color of print? Describe background – color, busyness
Developing Functional Requirements Object dealing with What is material? What is finish (texture) like? Dull, glossy, specular? Is surface finish the same on all surfaces? For all part numbers? Production runs? Any platings, coatings, films, paints? Markings?
Developing Functional Requirements Object dealing with – Shapes – flat, curved, gently curved, other? Irregular, grooved, sharp radii, mixed geometric properties? Part orientation variation? Part sizes? Part colors? (hue, saturation, brightness) Part temperature?
Developing Functional Requirements Object dealing with – Possibility of warping, shrinking, bending, etc? Any change in appearance over time? Any markings? General appearance variables? Sensitivity to light?
Developing Functional Requirements Material handling Present handling or being considered? Production rates? Currently? Future? Parts static? Moving continuously? Speed? If indexed How long stationary? Total in-dwell-out time? Settling time? Acceleration?
Developing Functional Requirements Material handling Maximum positional variations – translation, rotation? More than one stable state? Volume envelope for MV? Any restrictions or obstructions? What triggers action? What is result of MV?
Developing Functional Requirements Operator interface Fail-safe operation? Program storage requirements? Data storage requirements? Power failure requirements? Reporting requirements? False reject and escape rates?
Developing Functional Requirements Machine interfaces Alarms desired? Other machine integration? What event triggers MV action? How detected? How communicated to MV? Machine interfaces: part in position, sensor type, PLC, Ethernet, etc. Hierarchical interfaces anticipated?
Developing Functional Requirements System availability/reliability Number of hours per week? Hours available for maintenance? Calibration procedures? Challenge procedures? MTBF? MTTR?
Developing Functional Requirements Other issues Special paint? Installation? Warranty? Spare parts? Documentation? Training? Software ownership?
Good RFP Describes project in detail Describes operations business Reviews why the project is being solicited Reviews schedule
RFP Should Request Schedule Training Service Warranty Software ownership Documentation Installation support
Steps to Take When Buying a Machine Vision System Identifying Vendors AIA - Directory MVA - Directory Opto*Sense database Vendor type: image processing board general purpose machine vision system application specific machine vision system system integrator
Understand the Vendors
Machine Vision Industry Image Processing Board Suppliers General Purpose Machine Vision suppliers Machine Vision Software Suppliers Smart Cameras Suppliers Application Specific Machine Vision Suppliers System Integrators OEM
System Integrator Look for application competency industry competency technological competency professional competency technology independence schedule/cost
System Integrator Questions to ask: Have you done anything like this before? What do other clients think of you? Do you understand my requirements? Are your skills consistent with my requirements?
Need a Consultant? Time an issue and corporate resources are lean Consultant can: write specifications write bid package identify vendors evaluate proposals prepare acceptance test plans
Need a Consultant? Consultants conserve resources bring technology knowledge bring vendor knowledge bring objective counsel bring negotiating prowess
Steps to Take When Buying a Machine Vision System Evaluate vendors systematically Use Decision Matrix technique to assess proposals Visit the best vendors to assess: application engineering skills quality control procedures software practices training materials documentation policies references
Proposals Should Include Review of implications of variables: staging image processing image analysis Implication of organization/lack of organization of parts Time budget to demonstrate confidence throughput can be met
Proposals Should Include Position/temperature error budgets Interfacing issues: people machine/line Miscellaneous issues: enclosuresstart up/changeover battery back upmaintenance diagnosticscalibration reports
Proposals Should Include Exceptions to the spec Responsibilities: installation specifically what is required for system to be successful Acceptance testing validation procedure challenge set
Proposals Should Include Policy review training installation warranty field service spares software upgrades documentation
Proposals Should Include Schedule Cost
Proposals Should Reflect Familiarity with processes Grasp of problem Completeness and thoroughness Responsiveness Evidence of good organization and management practices Qualifications of personnel
Proposals Should Reflect Experience in similar or related field or application Record of past performance Project planning Technical data and documentation Geographic location
Proposer Evaluations Schedules References Quality control practices Vendor skills: optics TV Mechanical engineering Quality engineering
Sizing up Vendors - Differentiators How long before a service call is made or phone support is obtained Are software upgrades included in the price? Is upgrade notification automatic? What is the companys annual sales revenue in the specific product/application
Finalize Evaluations Make sure vendor understands Visit most responsive vendors Visit up and running installations
Vendor Decision Previous work Quality of work Reputation Ability to meet schedule Understanding of your business and application
Reference Checks Quality of work Ability to meet schedule Policies Support Would they do it over !!!
Systems No system should be more complicated than it need to be! Good application engineering is critical! Contrast, Contrast, Contrast! Staging is important, if not more important than image processing algorithms!
Customer Software and hardware should be transparent! Tinkering should be discouraged! Should not specify equipment, rather function! Samples furnished should be representative of all variables expected! Training is critical! A little knowledge is dangerous!
Vision Company Room lighting is a No - No! Vision company should have all disciplines required! Beware of Piece of cake! Look for relevant experience! Verify quality practices! Verify policies: training, documentation, etc.!
Systematic Buy-off Procedure
Application Engineering Material handling Must avoid jamming regardless of deformities! Murphys Law - If it can go wrong, it will! Lighting Lighting is not a constant! Never use software to compensate for poor lighting! Shrouds are cheaper than software fixes!
Application Engineering Optics There are limits to resolution! Nothing exceeds the speed of light! Image resolution Nyquists theorem does apply! More resolution means more compute power! A pixel is not a fixed size! - Magnification issues
Steps to Take When Buying a Machine Vision System Write an acceptance test plan/buy-off procedure Different for: attribute inspection system - based on Thorndyke Chart to arrive at sample size - to test for both escapes and false rejects gauging/location analysis - repeatability/accuracy performance at upper limit, nominal and lower limit of tolerance
Acceptance Testing Includes evaluation of operator interface basic operation calibration accuracy & repeatability throughput sensitivity maintainability availability
Acceptance Testing Test at system level Test at other than nominal Test failure modes Test everything in system spec Dont put anything into spec that can not be tested!!!
Buy-off at Supplier Simulate external equipment Generate reports Run through all screen functions Simulate alarms and failure modes Power up/down system and components
Steps to Take When Buying a Machine Vision System Using the Thorndyke chart e.g.. for 0 defects 95% confidence 400 PPM (reliability) from chart np n = 3/400 x n = 7,500 for every factor: color, finish, size, etc.
Steps to Take When Buying a Machine Vision System Create a challenge to verify performance
Working With The System In The Factory Should not deteriorate production speed! Ideally, avoid having to re-engineer the manufacturing process to accommodate machine vision! System should have the capacity to be reconfigured!
Training Basic principles of operation Normal operating procedures screen functions power up/down reports Alarm conditions and recovery procedures
Training Back-up procedures Normal and emergency maintenance Calibration
Mistakes in Buying Automation
1. No equipment specification 2. Requesting quotes before visiting prospective suppliers 3. Incorrect cost estimate 4. Insufficient in-house machine support 5. No input from production people
Mistakes in Buying Automation 6. Poor communication with vendor 7. Acceptance of inadequate equipment 8. Failure to supply latest drawings and parts with specifications 9. Failure to design for automation 10. Using the wrong technology per E. Martin, Lanco/NuTec, Assembly March 96
Reasons Why Automation Fails Per Automation Research Corp. Study Unclear or false expectations regarding what is to take place and the results that are to be achieved Lack of commitment by user management Over dependence on technical solutions
Reasons Why Automation Fails Lack of acceptance by the user organization Poor project management Not properly taking into account the human resources issues
SI Difficulties With Users Inadequate specifications Lack of technical knowledge No management commitment Internal policies Separating needs from wants Inability to take over system Changes in midstream
SI Difficulties With Users No one person in charge Tight project constraints Lack of communication Price constraints Inability to take risks Manpower shortages Rigid specifications
Benefits of Machine Vision Scrap reduction Scrap disposal costs Rework Inventory reduction associated with rework Avoiding value added Improving machine uptime - capital productivity Avoiding return and warranty costs Improving customer satisfaction
Project Justification Tangible benefits: increase productivity reduce scrap reduce rework time/inventory avoid adding value to scrap avoid product returns - warranty issues avoid liability issues avoid field service
Project Justification Tangible benefits: avoid freight costs on returns avoid equipment breakdowns/improve machine uptime improve product fabrication cycle and impact on inventory save indirect labor cost save floor space to store rework inventory
Project Justification Tangible benefits: training/labor/turnover/recruiting costs out of cycle costs due to schedule upsets waste disposal costs costs of overruns to compensate for yield personnel/payroll costs per employee: average workers compensation average educational grant per employee tooling/fixturing savings
Project Justification Intangible benefits improve quality - consistency of quality predictability of quality information automation flexibility people effectiveness/limitations sample inspection only monitors system errors, not random errors
Project Justification Intangible benefits: process control environment consumer/government pressure eyes for automation expansion needs seasonality
Project Justification Because some things appear to be intangible does not mean they have zero value !!! In final analysis, justification of technology is a management issue - not an accounting issue !!!!
Project Justification Data required: How many pieces are produced per month per line? How many production lines make the piece? What is the current inspection time per piece? (minutes/piece) What is the inspection labor rate? ($/hr including benefits)
Project Justification Data required: How many rejects per month (%)? What is the value of a reject - $ -? What is the value of the raw material in the piece - $ -? What percent of the rejects are reworked per month? What is the average rework time/piece (minutes/piece)?
Project Justification Data required: What is the monthly warranty cost - $? - includes costs of field service, field returns, repairs, shipments to and from plant, paperwork, etc. Product liability costs per month - $? - includes liability claims, lawyer fees, insurance, paperwork, etc.
Project Justification Data required: What percent of the rejects are scrapped per month? - the difference between the number of rejects per month and the number of rejects reworked per month and returned to inventory What are the monthly waste disposal costs due to the scrapped pieces?
Project Justification Data required: What are the scrap and rework inventory costs per month? - eg. Calculate based on average number of units scrapped and in inventory per month multiplied by the value (cost) of the piece divided by 10 (factor that assumes any such unit will only be in inventory an average of two days) How many shifts does the line operate?
Project Justification Data required: Total hours operating per shift? Hours worked per month/shift/person? - paid hours Number of units sold per month? Average selling price of the piece? - not cost Indirect (supervisory) labor rate ($/hr with benefits)? What is the profit per piece produced? ($)
Project Justification Data required: Current cost of money? Prime rate + 1%? If sample inspection, hours per month for specific piece?
Project Justification Calculated values: annual direct cost of inspection per piece = inspection labor rate X hours worked per month/shift X number of shifts line operates X 12 annual indirect cost of inspection per piece = indirect labor rate X hours worked per month/shift/person X number of shifts X 12
Project Justification Calculated values: cost of rejects scrapped = percent rejects/ month X value of a reject X % pf rejects scrapped/ month X number of pieces produced/month X 12 cost of rework = percent of pieces reworked/month X number of pieces produced per month X rework time X rework labor rate X 12
Project Justification Calculated values: warranty costs = monthly warranty costs X 12 liability costs = monthly product liability costs X 12 scrap disposal costs = monthly cost X 12 scrap and rework inventory costs = monthly X 12 training costs - based on turnover experience
Project Justification Assigning values: value of reliable data = sum of annual direct and indirect labor costs X 0.05 value of improved customer satisfaction = average selling price of the piece X number of units sold per month X 12 X 0.001
Project Justification Assigning values: percent uptime line improvement anticipated - an estimated value value due to gain in line uptime = cost of machine vision system X number of systems required X 0.05
Project Justification Costs cost of machine vision system (or systems) launch costs (training, etc.) - estimate 10% of machine vision system costs annual service contract - estimate 10% of machine vision system costs
Project Justification Costs: opportunity cost - function of the cost of money = cost of the machine vision system X number of systems + launch costs + annual service contract X number of systems X current cost of money
Project Justification Costs: total equipment costs = cost of machine vision systems X number of systems + launch costs + annual service contracts X number of systems + opportunity cost average annual cost over four years = total equipment costs/4
Project Justification Return on investment = (average annual savings/total equipment costs) X 100 Payback (years) = total equipment costs/(average annual savings + average annual costs with machine vision)
Average Payback Period by Company Size Per Automation Research Corp.
Average Payback Period in Years by Industry Per Automation Research Corp.