Lean came with definition of waste Everything that is done but not necessary for the final productThere is one visible kind of waste now: inventory How may houses produced x 25 Pieces x 1Compare inventory accumulation with chartShow over/under production in the example Houses produced but not sold Houses demanded but not produced
Overproductionproducing items when orders have not been received.Waiting People waiting to have their setup readyConveyance Unnecessary transportationOverprocessing More work than necessary Inventory Example cited beforeMotion Time lost in moving parts of the system/productDefects If in the end we have a defect in the product, everything was thrown awayIt could be argued that the work done is going to be useful in the future But how about if the market changes?
PushFord: demand was not an issue. Sell everything that is produced. Goal: maximize productionEver cheaper labour, ever faster machines ran out of both
TaiichiOhno went to the US to study the cars industry, and said that wanted an industry that worked like an american supermarket
PullSupermarketProduce based on demandNeed a way to signalize when more work has to be done
You need somehow to signalize that more work is needed
55 minExplain how the process should work
Break after retrospective
One solution: balance number of people based on constraints
Video: Production line of BoingBalance people based on constraintWhat’s the ideal scenario?
Discussao sobre como modificar o processo
On a practice level Pull system/Kanban (Later section)On a principle level Challenging status quo Inspect quality in Competing against yourself Empowering people
Predictable and Repeatable (as in Manufacturing): Build process / Deployment processCreative / Information Flow / Create Knowledge (as in Product Development)