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George Moroses
/ Categories: Infor LX & BPCS Tips, Manufacturing

Infor LX & BPCS Manufacturing Tip of the Week: Backward Scheduling

Operations are automatically backward scheduled at shop order release time. The backward scheduling algorithm starts with the shop order due date and schedules each operation based upon the standard move and queue times in the routings and the number of days the job is expected to run at standard. The system calculates and stores the operation scheduled start date. The dates may be modified by the shop order maintenance program. The number of days that a job is expected to run an operation is dependent upon the available capacity for that work center and the total hours scheduled for that operation.

The backward scheduling algorithm also considers the shop calendar for weekends, shutdowns, holidays, and partial days.

Backward Scheduling Process

The algorithm starts with the due date of the shop order or planned order. The system makes the following calculations for each operation in the reverse sequence:

  1. The number of move days is subtracted from the due date (or initial date of the previous operation) to get the due date for this operation. The move days are only used on valid shop calendar days.
  2. The system uses the following calculation for the number of clock hours for the operation: Standard run or machine hrs/No. of operators + setup hours
  3. The number of clock hours is spread over the available daily capacity of the work center for those given days. The system uses the following calculation for the daily capacity of the work center: Number of shifts x hours per shift x average efficiency/100
  4. Each day is checked against the shop calendar; the calculation bypasses inactive days or adjusts for any changes in the work center capacity for that day.
  5. Queue time days are subtracted in the same manner as move time days. The resulting date is the operation start date.

The algorithm then goes to the previous operation. When all operations have been included, the resulting date is the scheduled start date of the shop order. Note that MRP uses the item lead time to determine material requirement dates on planned orders.

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Tips:  LX | BPCS | M3

The Cycle Counting Sub-System Within Inventory Management

The system uses the following information as the basis for cycle counting selection:

  • Cycle Counts/Year: The system calculates the time between cycle counts based on your entry in this Item Master file field for each item (optional).
  • Last Cycle Count Date: This date is in the Location Inventory file, ILI, if you use locations, or in the Warehouse Inventory file, IWI, if you don't.

The system adds the time between cycle counts (calculated as described above) to this date. If the result is less than or equal to today's date, the item is selected for cycle counting. If it is greater than today's date, the item is not selected, it is not due yet for cycle counting.

There is another special condition that causes an item to be selected for cycle counting. If the ILI/IWI record of the item has a Y in the Cycle Flag field, the item is selected automatically. This flag indicates that the item's on-hand balance has gone to a negative value sometime since the last cycle count. That applies even if the value is not negative at selection time. The programs that can set this field are INV500D, INV510, and BIL540.

You can also limit the items selected for counting by specifying limits of the item numbers or warehouses to be searched.

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Tips: LN | Baan

All actions required for converting, validating, matching, and posting electronically received bank statements can be performed within a single session:

  • Bank Statement Workbench (tfcmg5610m100)
  • Bank Statement (tfcmg5610m000)

Alternatively, you can use the sequence of electronic bank statement sessions outlined below.

Steps to Process Electronic Bank Statements:

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