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Theory of Constraints Drum Buffer Rope (DBR)

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Theory of Constraints Drum Buffer Rope – What is Drum Buffer Rope (DBR)? Drum Buffer Rope (DBR) is the Theory of Constraints scheduling process focused on increasing flow by identifying and leverage 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 […]

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The biggest constraint we Theory of Constraints consultants find is … (part 2)

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The Allocation Mind-set By Dr Lisa Lang We have worked with companies around the globe and the constraint is always the same.  It’s how we think.  In particular, it’s how the business owner or leader of the company thinks. Last time, in Part 1, we discussed the efficiency mind-set and how focusing on efficiency can lead you astray.  I made the […]

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The biggest constraint we Theory of Constraints consultants find is … (part 1)

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Theory of Constraints for Job Shops and Machine Shops (Custom Manufacturers) By Dr Lisa Lang We have worked with companies around the globe implementing Theory of Constraints, Lean and Six Sigma and the constraint is always the same.  It’s how we think.  In particular, it’s how the business owner or leader of the company thinks. You buy the same equipment […]

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Job Shop Scheduling Problems and Challenges

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Job Shop Scheduling – High mix low volume job shops and machine shops can be quite a challenge to schedule.   Why?  Here are just a few of the complex problems and challenges that plague the environment: Bottlenecks or constraints in job shops can move based on the volume and type of work. Work is diverse — typically low volume high […]

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Your Job is Late, AGAIN -> Poor On Time Delivery

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Dear Customer, As you know we’ve struggled achieving on time delivery.  Let me assure you that this has not been due to lack of interest, or because we don’t value you, our customer.  It was a systemic problem that we’ve only just recently figured out. The purpose of this letter is NOT to provide you with excuses as to why […]

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Does Lean manufacturing work in job shops and machine shops?

by Dr Lisa Lang