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George Moroses

Infor LX & BPCS Manufacturing Tip: 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.

Backward scheduling is supported in all shop order release programs (SFC500, SFC550, and FAS510). Backward scheduling is recalculated if a shop order is maintained through SFC500 when the due date or the required quantity is changed; however, you cannot enter move and queue times through the maintenance program when adding an operation to the shop order.

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Tips:  LX | BPCS | M3

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Tips: LN | Baan

Many transactions in all kinds of modules use order numbers or serial numbers. These order numbers are most often automatically generated. In the Number Groups (tcmcs0151m000) session you can define groups of order numbers used for dedicated areas. A Number Group is a group of the first free number series that you can assign to a specific use. All the numbers that Infor LN generates in the number groups that are dedicated to the same purpose are unique.

All the first free numbers are stored in the table tcmcs050.

As many different processes can request a free number from the number groups, we often see delays in the performance, due to locking on the first free number records. This locking issue can have a severe impact on the performance of huge batch-type transactions, but also on the performance perceived by individual users in many areas in LN.

For example:

In the ever-evolving landscape of manufacturing, cyber threats have become a formidable challenge, with a notable spike in ransomware attacks catching many off guard. These sophisticated attacks deploy tactics that are often new and bewildering to manufacturers, pushing the boundaries of what we thought we knew about cybersecurity in the industry. Let's dive into how these advanced threats are reshaping our approach to digital defense in manufacturing.

https://www.industryweek.com/technology-and-iiot/cybersecurity/article/21284176/a-new-wave-of-cyber-attacks-five-actions-to-take-now

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