Splitting an operation
Asprova APS Introductory Manual
When there are multiple resources of the same type, you can split an operation and assign the split operations so as to be performed in parallel by those resources, and thereby reducing the production lead time. In Sample 1-2: Reduce production lead time, there are four resources of the same type that can be used for Process2. Let's make the best use of the available resources.
There are several ways of splitting operations in Asprova APS:
- (1) Setting resource split size MAX for a resource in the resource table
- (2) Setting operation split size MAX for a use instruction in the Integrated Master
- (3) Specifying values for split properties for an item
- (4) Specifying values for split properties directly for a specific operation
(1) is a method of splitting an operation by setting the maximum production quantity of operations that are to be assigned to that resource. For example, if an operation with production quantity of 25 is assigned to a resource with a split size MAX of 10, the operation will be split into three operations with production quantities 10, 10 and 5.
(2) is a method of splitting an operation by setting the maximum production quantity for a combination of item and resource.
(3) is a feature that enables you to specify for a given item, a split number, a split ratio, and the number of resources to which you want to assign the split operations.
(4) is a method of directly splitting a specific operation.
Now let's try to do the split setting using method (3).
Open the item table, and for each item for which we want to split operations (ProductA-2, ProductB-2, and ProductC-2), click the item code, select the "Split" tab in the properties window, and specify "4" for both the "Split number" and the "Split parallel number".
After specifying the split number and the split parallel number for the three items, click the [Reschedule] button.
Each operation of Process2 is split into four and assigned to the four resources in parallel. Thus, the split number property is used to specify the number by which you want to split an operation and the split parallel number property is used to specify the number of resources to which you want to assign the split operations. (By setting different values for the split number and the split parallel number, you can confirm exactly how they affect the schedule.)
Simply by specifying values for the split properties, we were able to reduce the production lead times considerably. However, there is still one operation that is late. Let's try shortening the lead times even more.