Component CTP

In a component CTP check for an item, LN checks whether a sufficient quantity of the components of the item is available to produce that item.

As a rule, a component CTP check is carried out in the following situation:

The ATP of an item is checked.
The item's ATP value is insufficient to cover the demand involved.
Component CTP checks are enabled for the item involved (see the Items - Planning (cprpd1100m000) session).

A component CTP check is performed on the items bill of material (BOM), on its bill of critical materials (BCM), or on its generic BOM if the items customized. In all situation, you must select the Critical in CTP check box in the Items - Planning (cprpd1100m000) session of the component items that LN must take into account during a component CTP check, so that LN recognizes them as critical in CTP.

For each CTP-critical component, LN carries out a full CTP check. This check can consist of various types of ATP and CTP checks, based on the settings in the Items - Planning (cprpd1100m000) session. Note that this can result in a multilevel component check, in which LN also checks lower-level components.

Note:

The component CTP check ignores the specification, regardless of the value of the Inherit Demand Peg field in the Job Shop List of Material (tibom3610m000) session, or Inherit Demand Peg fiend in the Bill of Material (tibom1110m000), if the Job Shop by Site parameter in the Implemented Software Components (tccom0100s000) session is Inactive.

LN simply presumes that all of the ATP of the components is available.

Note: If you use the Enterprise Modeler Content Pack with LN, consider using the MPL1110 (Planning of Cumulative ATP and/or CTP) wizard to set up ATP and CTP. You can execute this predefined wizard from the Wizards by Project Model (tgwzr4502m000) session after you specified the business function model for your company.

Example

You produce 4 items: A, B, C, and D.

D is a critical component of C
C is a critical component of B
B is a critical component of A

In the Items - Planning (cprpd1100m000) session, you selected the Component CTP check box for all items, and you selected the Critical in CTP check box for item B, C, and D. You did not select the Capacity CTP check box, the Channel ATP check box, or the Family Item CTP check box.

LN starts a CTP check for item A with a standard ATP check. If the ATP of item A is insufficient, LN carries out a full multilevel CTP check for item B. This means that the following data is checked:

The ATP of item D
The ATP of item C, plus the volume that can be produced based on the ATP of item D
The ATP of item B, plus the volume that can be produced based on the ATP of item C

Requirement date of the component

If you perform a component CTP check, LN calculates the requirement date of the component based on the requirement date of the main item. The difference between the requirement date of the main item and the requirement date of the component is the lead-time offset.

LN plans the offset against the applicable calendar and the availability type defined in the Planning Parameters (cprpd0100m000) session. The value of the Component CTP bucket field in the Planning Parameters (cprpd0100m000) session also impacts the lead-time offset.

Using the Job Shop List of Materials

The component CTP check is based on the job shop bill of materials, LN calculated the requirement date of the component by using the data in the Job Shop List of Material (tibom3610m000) and Item - Production (tiipd0101m000) sessions.
If the Job Shop List of Material (tibom3610m000) session has the Specify Material Offset check box selected for the specific product and site combination, the value of his field is used as the lead-time offset.
If the Job Shop List of Material (tibom3610m000) session has the Specify Material Offset check box is cleared, the order lead time of the product is used as the lead-time offset. An item's order lead time is defined in the Order Lead Time Unit field in the Item - Production (tiipd0101m000) session.

Using the Bill of Material BOM (Old)

The component CTP check is based on the bill of material (BOM), LN calculates the requirement date of the component by using the data in the Bill of Material (tibom1110m000) and Item - Production (tiipd0101m000) sessions.
If in the Bill of Material (tibom1110m000) session, the Specify Material Offset check box is selected, LN uses the value of the Lead Time Offset field in that session as the lead-time offset.
If in the Bill of Material (tibom1110m000) session, the Specify Material Offset check box is cleared, LN uses the order lead time of the main item as the lead-time offset. An item's order lead time is defined in the Order Lead Time Unit field in the Item - Production (tiipd0101m000) session.

Using the Bill of Critical Materials (BCM)

If the component CTP check is based on the bill of critical materials, LN calculates the requirement date of the component by using the data in the Planning Bill of Critical Material (cprpd3120m000) session.

If in the Generic Bill of Material (tipcf3110m000) session, the check box is selected, LN uses the value of the Lead Time Offset field in the Planning Bill of Critical Material (cprpd3120m000) session.

Using the Bill of Critical Materials (BCM) (Old)

If the component CTP check is based on the bill of critical materials, LN calculates the requirement date of the component by using the data in the Planning Bill of Critical Material (cprpd3120m000) session.

If in the Bill of Material (tibom1110m000) session, the check box is selected, LN uses the value of the Lead-Time Offset field in the Planning Bill of Critical Material (cprpd3120m000) session.

How to set up component CTP checks

Set up the main item

If the Component CTP check box in the Items - Planning (cprpd1100m000) session is selected for a particular item, you can carry out component CTP checks for the corresponding item.
Clear the Component check box in the ATP Handling (cprrp4800m000) session to disable component CTP checks for that item.

Note: You can also use component CTP checks in configure-to-order situations.

Set up the componentsIn the Items - Planning (cprpd1100m000) session, select the Critical in CTP check box for all components that must be checked.

Specify a lead-time offset in one of the following ways:
- In the Bill of Material (tibom1110m000) session, select the Specify Material Offset check box and enter the lead-time offset in the Lead Time Offset field. If an item is used as component for multiple main items, you must specify this lead-time offset in every bill of material where the component occurs.
- In the Job Shop List of Material (tibom3610m000) session, clear the Specify Material Offset check box. In the Item - Production (tiipd0101m000) session, enter the lead-time offset in the Order Lead Time Unit field. If the item is used as component for multiple main items, LN uses this value in the CTP calculations for every end item.