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.