Administrative and Production calendar sections consist of three parts. They are: Company Holiday setup, Work Days setup, and Calendar Date Ranges setup. This setup section will generate a calendar, which is referred to by ManEx for calculating delivery days, lead times, due dates, MRP actions and much more.
ManEx recommends that the user maintain a minimum of at least two years of calendar data ahead of the current date. If the user places 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, the user should have at least six months in the past, otherwise any MRP actions that show up as being required beyond that date will provide erroneous information.
However ManEx recommends that the user does 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 a little longer to find the target information. In accounting, each time they post and close, accounting makes a record for every account, for every period in the accounting calendar. So the fewer periods set up, the faster the process of updating the accounting records.
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