Job Shop Scheduling Articles

Theory of Constraints Drum Buffer Rope (DBR)

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Theory of Constraints Drum Buffer Rope – What is DBR? Drum Buffer Rope (DBR) is the Theory of Constraints scheduling process focused on increasing flow by identifying and leveraging the system constraint.  DBR was developed by Eliyahu M. Goldratt (Eli Goldratt), the father of Theory of Constraints. This article explains what is Drum Buffer Rope and how it works.   This […]

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How to measure Due Date Performance so you CAN improve it!

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Due date performance (DDP, also called On-time Delivery) is a common metric used both internally and by vendors to monitor the performance of job shops, fabricators, MRO, and machine shops.  Whether DDP is a Key Performance Indicator (KPI), Balanced Scorecard metric, or part of your vendor performance, it is an important measure that many shops strive to improve.  And that’s […]

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Job Shop Scheduling – Backlog Problems – Max Profit Part 9

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Job Shop Scheduling – Sales Backlog, Is it too Big or too Small? Brad:  “It is common for job shop owners and managers to keep a close eye on the size of their Sales Backlog.  It is a barometer of how things are going.  Usually it is expressed in dollars.  It is also expressed as a ratio, like ‘our backlog is 4 […]

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Strategic Planning for Job Shops Budgeting – Max Profit Part 5

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Maximizing Profitability the TOC Way #5   This is the fifth in the 9 part series of conversations. Brad:  “Let’s talk about job shop strategy.  After all, it’s that time of year again.” Dr. Lisa:  “Yes, in the big companies you and I used to work for, the budgeting process starts early and continue for weeks and weeks – almost interminably.” […]

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Job Shop Productivity and Machine Shop Productivity – Max Profit Part 4

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Maximizing Profitability the TOC Way #4 – Job Shop Productivity & Machine Shop Productivity This is the fourth in the 9 part series of conversations. Brad:  “So you have recommended that improving productivity is a great first step for maximizing profitability for highly custom job shops and machine shops.  But that first step of cutting work-in-process (WIP) seems so counterintuitive.  […]

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Maximizing Job Shop and Machine Shop Profitability the TOC Way – Max Profit Part 3

by Dr Lisa Lang