Family CTP

You can carry out a CTP check on individual items, but you can also check the CTP on product-family level. In fact, you can transfer the CTP check for an item to any other item.

Family CTP checks are useful in three situations:

  • The items in one product family are very similar: most of the material requirements and capacity requirements are the same. In that case the production plans of these items are easily interchangeable and the CTP can be checked on the totals of the production plans, demand forecasts and customer orders.
  • The demand forecasts for the longer term are made on product-family level and not on item level. The short-term demand forecasts for plan items are made on the lowest plan level. If a customer order is to be delivered in a later period, the CTP check is performed on product-family level.
  • The CTP check must be performed in a central logistical company. This is especially useful in a situation that several logistical sites are interchangeable with respect to the CTP. The product family on which the CTP check is performed can be defined in another (central) logistical company. All the logistical data of the product family is the summation of the logistical data of its child items.
How to use family CTP

The execution of family CTP checks depends on the following settings in the Items - Planning (cprpd1100m000) session:

  • The Family Item CTP check box.
  • The Start of Family CTP Horizon field.
  • The Family Site field.
  • The Family Item field.

The Start of Family CTP Horizon field determines after how many workdays the family CTP horizon starts:

  1. A preliminary start date is computed using the value of the Start of Family CTP Horizon field.
  2. This start date is rounded to the end of a plan period. Effectively, this means that the next plan period is the first period of the family CTP horizon.
Example: family CTP horizon
[...]
Current Date (A):May12
Start of family CTP horizon after:25 days
Current date + 25 days (B):June 6
Start of family CTP horizon (C):June 14

 

In periods 2, 3, 4, and 5 the CTP check is on item level. From period 6 onward the CTP check is on product-family level.

The end of the family CTP horizon coincides with the CTP time fence.

If family CTP checks are enabled for a plan item, any CTP checks for that item within the family CTP horizon are redirected to the item in the Family Item field.

Note

You can enter any plan item in the Family Item field; the plan-item type does not necessarily have to be Family.

The CTP check can again be transferred from the product family to another product family. This depends on the CTP parameters of the product family. In other words: the procedure can take several steps before the item is found on which the actual check takes place.

If family CTP applies, the following checks are redirected to the family level:

  • Standard ATP check
  • Component CTP check
  • Capacity CTP check
Note

Channel ATP checks are not redirected to a higher family level, but are always carried out at the level of the item itself.

Clear the Family check box in the ATP Handling (cprrp4800m000) session, to disable the family CTP check for that session.

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