Replies posted by ML1986
Hello Mohansx, thanks for you reply on such sunny day. the machine time is in minutes and all the orders are known in advance, in the example thats the production program for one day. The Article is not relevant in the first step, only machine time (minutes) and the consumption of containers. So i should better use the same units, instead 8 containers per hour the value of 0,13 containers per minute (cpm). I want a schedule with minimized completion time with the constraint of less than 8 containers transported per hour in average. So for example Order 1691940090 has a machine time of 74,5 minutes and needs in this time period 11 containers (0.15 cpm). So we ware far above the 8 containers per hour, but it can be compensated, if the next order for example 2365350010 only needs 2 containers in 57,4 minutes (0.035) . So overall for the two orders mentioned, the consumption is 11+2 containers in ~ 132 mins which is below 17,6 containers (8 containers a hour → 8/60 * 132 machine time min =
For the container requirement, there are many ways you could model this. One way is to keep track of the over/under usage of containers and pass it on to the next position. For example. Position1 - Order X, used 6 containers. That means Position2 can be given an order which needs up to 10 containers without any penalty because we used 2 less containers (8-6 ) in the previous position. If you assign OrderZ which need 13 containers to Position2, then we will have 8 - 3 = 5 (13-10 = 3) containers for Position3 to compensate. Hello, yes it has helped me a lot. Now i am able to sequence the jobs. For the Container Capacity-Problem it exists a regenerationrate von 30 containers per hour. so my plan was to be under the ratio of 0.5 containers per minute for two following jobs - because they are about 30 to 50 minutes in processing time. Example: Job A processing time 20 Minutes and demand of 5 containers and Job B with 30 Minutes processing time and demand of 6 containers → the two jobs ha
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