Logic to setup production plan, inventory balances, purchases, and shipments

Starting point
- known balances
- known available
- known prod schedule
- known shipments
- forecasted orders

Populate
- forecasted prod schedule
- forecasted on-hand
- forecasted available
- forecasted purchases

Iterate through each calendar day
1. materialize forecasted purchases
2. materialize production
3. materialize shipments
4. process forecasted order submissions
    1. check for inventory available
        1. Yes
            1. mark unavailable
        2. No or partial
            1. mark unavailable any partial
            2. schedule on next open slot regardless of request date
                1. raw materials available
                    1. Yes
                        1. mark unavailable (at begin prod date?)
                    2. No
                        1. mark unavailable any partial (at begin prod date?)
                        2. schedule a purchase net of lead time
                2. sub-components available?
                    1. Yes
                        1. mark unavialable (at begin prod date?)
                    2. No
                        1. mark unavailable any partial (at begin prod date?)
                        2. schedule on next open slot regardless of request date (return to 4.1.2.2)