| In some environments the process batch is
not equal to one. For example if you can only wash parts in batches of 50.
There are may chemical processes which can only run in fixed quantities.
Another example is an oven which 'cooks' a batch etc.
Suppose in this case the size of the transfer batch for a certain resource is fixed. What if the
A resource has always to work in batches of 50?
Did the constraint in this environment change? No. Even if each 400' the resource B gets 50 items to continue in the production process, the resource D can only produce 5 items per hour (i.e. max. 40 items a day).
What do we have to change in this case?
The buffer size. Only each 400' the production line gets
output of 50 items from A, and only then the line can continue. So as D
remains the constraint, we have to increase the buffer size (non
availability of a non constraint resource) to make sure D can guarantee the
5 pieces output each hour.
The buffer size should at least take into account the time of 400' required for the batch on A. Or check if it is really necessary to produce a batch of 50 on resource A before the production
can continue. |
