question

Instead a full integrated model can you attach the 5 models for the 5 different tasks? If you don't have a suitable model, please add a picture, a flow chart or a drawing, how the task look like?

1. Source and OnCreate trigger: set item type and color. Add a second template that change the size randomly discrete in the same trigger or OnExit.
2. Queue random batch size. Instead of a constant number insert a discreet statistical function. You know one statistical function from 1.
3. combiner OnEntry trigger: change the components list. Each possible combination gets a row in a global table. The order-ID or numerical part of a string is responsible for recipe instead of the item type.
4. This have already been done in a combination of the points 1. and 2. It is condition of the batching. Instead of a total random dimension setting you define for example 9 dimension sets and store the values in a global table. When you set the item dimensions you set randomly a label value at the item, which defines the table row of the dimensions table. While you batch the items you choose 4 of the 9 different dimensions (e.g. by the label at the item) at the queue. The items you don't choose stay in the full integrated model on the conveyor or go to a sink.
5. The items maximum size defines the dimensions of the packaging tote. This tote is the item that comes through the port number 1 into the combiner. You can use n-standard types of totes matching the dimensions you set at the source of 1.

Please do always only one small step in a model in the progress of the task. Then you store that model at a different name. You can compare different approaches later. Then try to integrate the different task models into the final model step by step. Instead of a table you can use a list, too. If you use ProcessFlow you use an event driven activity instead of a trigger. Please come back here if you have special questions like how to get 4 numbers randomly out of an interval of 9.