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lead time calculation

how can i calculate the lead time for

finished ,semifinished and raw material

Former Member
Former Member replied

Hi Suresh,

I got below info from sapsword. Go through below info, it may be use full for you.

For Raw materials:

Scheduling for externally procured materials:

For the externally procured materials, SAP uses the planned delivery time (lead times) and goods receipt times in Material master to schedule the delivery & release dates for the procurement proposals. You can either use forward scheduling or backward scheduling for these materials. SAP uses the basic date scheduling in the case of externally procured materials

For Finished and Semi finished products:

Scheduling for in-house manufactured materials:

For materials which are to be manufactured in house, as assemblies and subassemblies (in-house produced materials), the scheduling is done according to the scheduling method selected in the selection screen of the MRP run.

· If the scheduling method selected is - ___u201CLead time Schedulingu201D__ the scheduling for the planned orders are done through the use of standard timings in the routings/recipes of the material. The Standard values or the standard timings in the routings or recipes are for a base quantity, which means that the scheduling carried out using the lead time method is an accurate method of scheduling and gives the greatest results every time. It not only calculates the operation lead time (operations start and finish times) but also cumulates them to arrive at a total lead time with an order start date and order finish date._

· When you use the u201Clead time schedulingu201D method, the system uses the scheduling methods configured; you can use either forward scheduling or backward scheduling method for the MRP run. As a default scheduling type, the system uses backward scheduling but it also switches automatically to forward scheduling if the determined start date lies in the past. Though if you do not want the system to switch to forward scheduling automatically, you can specify per plant in Customizing for MRP, in the IMG activity Parameters for determining the basic dates that the system is to continue the backward scheduling calculation even if the resulting start date lies in the past.

· Check the Lead time Scheduling example as shown below. Lead time scheduling uses the floats in the schedule margin keys (if any) and the standard values in the operation along with the operationu2019s interoperation times.

Order Lead time scheduling for In-house produced materials =

Opening Period from where the Planning opens as mentioned in Schedule Margin Key

+

u2013 u2018Order Floats before Productionu2019 starts here u2013 Floats mentioned in Schedule Margin Key. If floats = 0 then Operation start date = order start date

+

Operation 0010 Start date u2013 to u2013 Operation 0010 Finish date (calculated through the standard values in operations)

+

Operation 0020 Start date u2013 to u2013 Operation 0020 Finish Date (calculated through the standard values in operations)

+

Operation 0030 Start date u2013 to u2013 Operation 0030 Finish Date (calculated through the standard values in operations)

+

u2013 u2018Order Floats after Productionu2019 ends here u2013 Floats mentioned in Schedule Margin Key. If floats = 0 then Operation Finish date = order start date

· The selection of the Routing/Recipe is made through the u201Ctask list determination strategies included in the configurationu201D or if the selection method for the BOM selection is through u2018production versionsu2019 then the task list included in the version is used.

You can see this info in below link.

http://www.sapsword.com/home/learn-sap-pp/sap-mrp/sap-mrp-functionality/step-8---scheduling-of-procurement-proposals-in-sap-mrp-run

Regards / US

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