How do you create a pull production in your job shop environment? PROPOS can realize this for you. As soon as a production cell is fully scheduled, PROPOS will, if the planning allows it, automatically prioritize production orders that must go to another production cell. This way you stop the traffic jam with one operation and the flow of orders is guaranteed.
A production planning in the traditional sense includes a planned start and end date for all orders to be produced per operation. These are calculated in advance on the basis of the estimated number of hours of work per operation and possibly a number of theoretical optimizations. Orders are sent based on this schedule; the first operation must start on the first scheduled start date and end on the first scheduled end date. The order is then transferred to the next department where you can see on the schedule when the order should start and end there. We call this principle a push planning; orders are pushed through the system from front to back.
The disadvantage of such a push production is that you also keep pushing work towards directions where it is already too busy. A traffic jam of waiting orders occurs, and it takes more and more effort to get the orders processed through the factory. Imagine you are increasingly trying to push them through a funnel; accumulations (bottlenecks) occur, and it takes more and more power.
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The alternative is a pull production that we support in PROPOS. Every production cell with available capacity starts asking for new orders. More capacity means more work is requested. The last production cells request orders from the upstream production cells. They, in turn, require work from the production cells before them, and so on. Partly based on that question, orders are automatically prioritized. Production cells that are already starting to fill up will, therefore, be allocated less work than production cells that still have enough space. This is continuously monitored and optimized in real time without you having to worry about it.
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