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The Principles Of Lean Repair Dr David J Horton Copyright© 2011 Beta Management Systems - All Rights Reserved
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A collection of complementary systems for reducing the various wastes in manufacturing processes
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The minimisation of excess inventory through continuous flow processes and demand smoothing. The minimisation of equipment downtime through the application Planned Maintenance Techniques. The minimisation of scrap, rejects, and customer dissatisfaction through the application of Statistical Process Control techniques
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What are some of the problems we face? Work not available on time Work delivered incomplete Poor quality Work delivered out of sequence Too much inventory Poor planning Too much transportation Cannibalisation of equipments Working in isolated groups
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Over Production Too much WIP Too many spares Too much waiting Too many faults
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Isolated Islands All in isolation, working blind to a production schedule
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Like a Tooth Paste Tube
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Pushing from the front end Large inventory Too much WIP
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Ensuring that the previous process only provides what the next process needs, when it needs it
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Continuous Flow JIT ~Just in Time
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The final stage of the process must always dictate the pace of supply
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The Supermarket Pulling system JIT ~Just in Time Lasso the work and Pull it through the system from the finish of the process
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What are the methods available?
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Kaizen Value Stream Flow Processes Kanban JIT ~ Just In Time Cellular Manufacture Total Planned Maintenance SPC ~ Statistical Process Control SMED ~ Single minute exchange die
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Then take Control with the 7W’s First clear out with 5S
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Seiri = Sort Seiton = Set in Order Seiso = Shine Seketsu =Standardise Shitsuke = Sustain
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Overproduction Inventory Transport Process waste Idle time Operator motion Bad quality
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Monitor progress with 3 simple Metrics
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Quality
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Cost
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Quality Cost Delivery
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The 7 QCD’s Not Right First Time Delivery Schedule Achievement People Productivity Stock Turns Overall Equipment Effectiveness Value Added Per Person Floor space Utilisation
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Cellular Manufacture One Piece Flow
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Value Stream Process divided into Cells
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Each Cell matched to the customers delivery requirements
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Value Stream Process divided into Cells Visual Kanbans passed back down the process Each Cell matched to the customers delivery requirements
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Takt Time Synchronised pace of production to match the pace of sales Takt Time = Your available work time Customers demand rate
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Takt Time Synchronised pace of production to match the pace of sales Takt Time = Your available work time Customers demand rate
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Op 1 Op 2 Op 4Op 5 21 mins Per cell Op 3 Takt Time 21 mins Per cell 21 mins Per cell 21 mins Per cell 21 mins Per cell A series of cells each equating to a duration 21 mins
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Each tick of the Metronome = 21 mins Takt Time Finished Product
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Time Optimum Time Balance the process 21 mins Op 1 Op 2 Op 3Op 4 Op 5
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Op 1Op 2 Op 3 Op 4Op 5 Op 1 Op 3 21 mins per cell 21 mins per cell 21 mins per cell 21 Mins per cell 21 mins per cell Op 5 Balance the process
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This is supported by the following complementary systems
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Visual Kanbans
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Kaizen / Andon Management Boards
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Statistical Process Control Maintaining Quality standards by Statistically Monitoring the Process
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Rapid Machine Changeovers (SMED)
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Beta Management Systems Copyright© 2011 Beta Management Systems - All Rights Reserved
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