2Product Design Constraints and Requirements Design Engineers must consider a multitude of technical, economic, social, environmental, and political constraints when they design products and processes.There must be clear evidence in your design project that you have addressed the constraints that are relevant to your project.
3Effect of Constraints Better Designs Constraint Limits Design Changes
4Functional Constraints Overall Geometry – size, width, space, arrangementMotion of parts – type, direction, velocities, acceleration, kinematicsForces involved – load direction, magnitude, load, impactEnergy needed – heating, cooling, conversion, pressureMaterials to be used – flow, transport, propertiesControl system – electrical, hydraulic, mechanical, pneumaticInformation flow – inputs, outputs, form, display
7Manufacturing Constraints Production of components – factory limitations, means of production, wastesPurchase of components – supplier quality, reliability, quality control, inspectionAssembly – installation, foundations, bolting, weldingTransport – material handling, clearance, packaging
8Timing Constraints Design schedule – project planning, project control Development schedule – design detailing, compliance testsProduction schedule – manufacture, assembly, packing, transportDelivery schedule – delivery date, distribution network, supply chains
9Economic Constraints $ Marketing analysis – size of market, distribution, market segmentsDesign costs – design team computing, information retrievalDevelopment costs – design detailing, supplier costs, testing costsManufacturing cost - tooling, labor, overhead, assembly, inspectionDistribution costs - packing, transport, service centers, spare parts, warrantyResources – time, budget, labor, capital, machines, material$
10Ergonomic Constraints User needs – type of operation, instructions, warningsErgonomic design – man-machine relationships, operation, height, layout, comfort, lightingCybernetic design – controls, layout, clarity, interactions
11Ecological Constraints General environmental impact – impact on natural resources, social resourcesSustainability – political and commercial consequences, implications for following generationsMaterial selection –solid, liquid, gas, stability, protection, toxicityWorking fluid selection – fluid, gas, flammability, toxicity
12Aesthetic Constraints Customer appeal – shape, color, texture, form, feel, smell, surprise and delight featuresFashion – culture, history, trendsFuture expectations – rate of change in technology, trends, product families
13Life-Cycle Constraints Distribution – means of transport, nature and conditions of dispatch, rules, regulationsOperation – quietness, wear, special uses, working environmentsMaintenance – servicing intervals, inspection, exchange and repair, cleaning, diagnosticsDisposal – recycle, scrap
14Legal/Ethical Constraints Regulations – OSHA, FAA, FDAEthics – public safety, health, welfare and integrityIntellectual Property – patents, trademarks, copyrights
16MidTerm Report Should describe MidSemester progress Think of it as a start on your final reportIntroductory and background material and project description material will remain the same
17Technical Communication Format (MAE 451) “Double Five”Include technical discussionInclude business topics as appropriate
18Report Format Summary The Problem Scope and Goals Solution Results ConclusionsReferences
19Summary Summarize the project and your work Don’t summarize the report Briefly introduce the problemSummarize the solution and conclusionsTypically half a page in length
20The Problem (Introduction) Introduce the design problem hereBackground information on the company or research/laboratory areaWhat is the project?
21The Problem (Introduction) Introduce the design problem hereBackground information on the company or research/laboratory areaWhat is the project?Why is it of interest?What are constraints or requirements that the solution must satisfyBriefly highlight the contents of the report
22Scope and GoalsVery specific description of your design project and expectationsWhat specifically was to be accomplished?Are you part of a team?Are you continuing a project?What is needed to finish the project?
23Solution Select Titles and Subtitles for your project This is the place to describe the details of your work process and issues encounteredDiscuss constraints and your management of them - a special subsection would be bestInclude figures, graphs and photosLarge amounts of information should be in an appendix at the end of the report
24ResultsDescribe the results of your work including your resulting designInclude figures, drawings etc. as appropriateComment on the quality of your technical results and design
25Conclusions Have you achieved the goals of your design? Is the problem completely solved?Is there continuation after the semester ends?Will the project have to be continued by another group?If more work is needed, describe it carefully and suggest a completion schedule.
26References References make your work credible Back up all of your facts with referencesIndicate references for any previous work on your design projectIndicate references for similar projects by othersUse references for any technical approaches used in your solutionState your references completely
27Report Format Summary The Problem Scope and Goals Solution Results ConclusionsReferences
28Comments on Figures Figures are best inserted directly in the text Insert figures right after they are discussedClearly number each figure and be sure to discuss the figure by numberAs an alternate - place all the figures together at the end of the report
29Just to SummarizeThink about CONSTRAINTS and report on their effect on your designMake your report professionalThink of the MidTerm report as a start on your final reportMake use of the suggested report format