The logic for splitting the processes or activities into substeps should be as follows:
1. If because of a subactivity, variations in the desired outcome of that activity will occur or if the shop floor is experiencing problems in that subactivity like for eg: Aluminium casting process should be split as following:
1. Weigh material
2. Melt material
3. Transport and pour into the mould.
Receiving should be split as Unloading the material and transportation to stores if the company is having problems during unloading like damages etc..
Second criteria for splitting should be as follows:
1. If the Cross functional team is not able to find the Desired outcome (Product characteristics) of the subactivity that there is no need to split that activity into subactivity. For eg: in a assembly process, if the subactivities are:
1. Place component in fixture
2. Place another component
If the team is unable to define the desired outcome for Step 1, then that splitting is not required.