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Lean Operational Definitions
Lean Operational Definitions
Lean Operational Definitions
Lean Operational Definitions
Lean Operational Definitions
Lean Operational Definitions
Lean Operational Definitions
Lean Operational Definitions
Lean Operational Definitions
Lean Operational Definitions
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Lean Operational Definitions

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Lean Manufacturing Systems

Lean Manufacturing Systems

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  • 1. Operational Definitions Sai Dinesh Koppuravuri ISYE650 Class Presentation Spring 2014
  • 2. Introduction Operational Definition • It is one that people can do business with… It must be communicable, with the same meaning to vendor as to purchaser, same meaning yesterday and today… (Deming, 1986) Purpose • First step towards effective management • Helps to build a clear understanding of a concept or a phenomenon so that it can be unambiguously measured 2
  • 3. Elements of an Operational Definition • Criterion: The standard against which to evaluate the results of the test • Test: A specific procedure for measuring a characteristic • Decision: Determination whether the test results show that the characteristic meets the criterion 3
  • 4. Example 1 • A blanket label says “50% wool ”? What does that mean? All Cotton All Wool • Or do you mean the wool should be mixed homogeneously throughout the cotton 4
  • 5. Example 1 (contd..) What do you think is missing ? Operational Definition • Criteria: Wool fibers evenly distributed and comprise half the blanket’s weight • Test: Analysis of samples measures distribution and proportion of fibers • Decision: Wool fibers evenly distributed and comprise half the weight. Blanket is 50% wool 5
  • 6. Example 1 (contd..) Why should anyone go through this rigorous process? • Each person in the team may have a different idea about what constitutes a defect • When a criteria is established for what is acceptable and test procedure for separating what is acceptable from what is defective, all team members can determine what is and is not a defect 6
  • 7. Example 2 What is a clean table? • If it is a workbench, it means that it is to be free of clutter • If it is a lunch table, cleanliness should be achieved by using a mild detergent • If it is an operating room, it would have to be antiseptically clean to prevent spread of infection • So not only having an operational definition is important, but also the context 7
  • 8. Exercise A quality improvement team at a medical clinic pharmacy was attempting to improve its process by making prescription service as fast as possible. Operationally define the term fast in this context • Criterion: Medication is dispensed at the customer service window no more than 10 minutes after the prescription is turned in at the pharmacy • Test: The time to fill a prescription is determined using a calibrated stopwatch • Decision: If the medication is dispensed no more than 10 minutes after receipt of the prescription, the criterion is met. Pharmacy service is fast 8
  • 9. References • Deming, W.E. (1986). Out of the Crisis, pp. 287289. Cambridge, MA: Massachusetts Institute of Technology, Center for Advanced Engineering Study. • Balanced Scorecard Institute (2014). Basic Tools for process improvement, Operational Definitions. Retrieved from http://balancedscorecard.org/Portals/0/PDF/o pdef.pdf 9
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