# relations between due date&ending date in MPS/MRP

**URL:** <https://www.dynamicsuser.net/t/relations-between-due-date-ending-date-in-mps-mrp/3649>\
**Category:** User Forum\
**Created:** [June 14, 2004, 3:35pm UTC](https://www.dynamicsuser.net/t/relations-between-due-date-ending-date-in-mps-mrp/3649 "2004-06-14T15:35:20Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![fjhxl](https://avatars.discourse-cdn.com/v4/letter/f/ecae2f/32.png) [@fjhxl](https://www.dynamicsuser.net/u/fjhxl)\
**Post date:** [June 14, 2004, 3:35pm UTC](https://www.dynamicsuser.net/t/relations-between-due-date-ending-date-in-mps-mrp/3649/1 "2004-06-14T15:35:20Z")

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Now one end user complain the interval between due date and ending date of Sales Order and Forecast is different after MPS calculation. In our system, the interval are normally 1 week. But this time we found the interval for some forecast change to 3 weeks and the interval for SO keeps 1 week. I read some document and realzie that safety lead time and default safty lead time in Mfg setup will affect the interval, but we didn’t setup any safety lead time. Howerver I am not sure how to define the interval 1 week in which repport or codeunit and other else setup can cause the interval? (navision attain 3.01B) Any ideas? Thanks in advance.