Administrative and production calendars consist of three sections:
1. Company Holiday setup
2. Work Days setup
3. Calendar Date Ranges setup.
This setup section will generate a calendar, which is used by manexSQL for calculating delivery days, lead times, due dates, MRP actions and more.
manex recommends a minimum of two years of calendar data ahead of the current date. If you place a purchase order a year in advance and the generated calendar range is not enough to cover the range, then the system will generate an incorrect schedule. Likewise, you should have at least six months of data in the past, otherwise any MRP actions that show up as being required beyond that date will provide erroneous information.
However, manex recommends that you do not setup an extensive amount of calendar years. Having extensive calendars (both accounting and production) will slow down operations in each. More specifically, MRP has to determine, from the production calendar, all of the possible dates necessary for production schedules. With larger files, it takes longer to find the target information. In accounting, each time they post and close, they make a record for every account and every period in the accounting calendar. Thus, the fewer periods set up, the faster the process of updating the accounting records.