production times/sizes

[hdavid16]

• Production times are fixed. Should be a function of amount produced (and then round up to nearest integer since discrete time)

[hdavid16]

Should be resolved by using production rates (continuous production), instead of just production time (batch production)

[hdavid16]

If plant lead time is set to 1, the the production capacity would upper bound the production rate and should be able to model continuous production.

[hdavid16]

Production times can be variable now since they are the lead time between the raw material storage and product storage nodes.
However, it is a stochastic variable. If you wanted to make it a function of the amount of material produced, then you would need to pass a function to the lead time (not implemented).