IE271_Lecture08 - IE271OperationsAnalysis andDesign Nine...

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    IE271 – Operations Analysis  and Design Nine Primary Approaches to Operation Analysis Lecture Notes – 08
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Operation Analysis Objectives: Increase productivity per unit time Reduce unit costs Maintain or improve quality Approach: Use a variety of flow process charting tools Scope: Effective for both small and large plants as well as job shops and mass production Applicable to all areas of manufacturing, business and government
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Nine Primary Operation Analysis  Approaches  All factual manufacturing information must be gathered All operations and facilities to perform the operations Operational times All moves and transportations Facilities used for transportation Transportation distances All inspections, inspection facilities and times All storages, storage facilities and times All vendor operations, along with their prices All drawings, quality and design specifications
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Operation Analysis We have seen many graphical tools to represent individual operations and the whole process Analyze the operations (either all or some of them) one by one, search for improvement potentials of the process After that reconsider the entire process as a whole
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Operation Analysis Ask the following questions to analyze Why is this operation necessary? Why is this operation performed in this manner? Why are those tolerances this close? Why has this material been specified? Why this class of operator has been assigned to do the work? Ask the following questions to synthesize How can the operation be performed better? Who can best perform the operation? Where could the operation be performed at a lower cost or improved quality? When should the operation be performed to yield the least amount of material handling?
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1. Operation Purpose 2. Part Design 3. Tolerances and Specifications 4. Material 5. Manufacturing Sequence and Process 6. Setup and Tools 7. Material Handling 8. Plant Layout 9. Work Design
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1. Operation Purpose Try to eliminate or combine an operation before trying to improve it!!! No installation of a new method No delays or interruptions No operator training on the new method SAVINGS You may expect to observe plenty of unnecessary operations due to improper planning of them
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1. Operation Purpose Unnecessary operation also develop because of the improper performance of a previous operation The second operation is generally a “polish” of the first operation. These types of operations may be eliminated easily
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1- Operation Purpose - Examples Spray painting armatures on a fixture Fixture blocks the bottom of the spray blast Touch up necessary Ball bearings purchased from an outside vendor need to be packed in grease prior to assembly Sealed-for-life bearings
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1. Operation Purpose To eliminate an operation, an alternative is to
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IE271_Lecture08 - IE271OperationsAnalysis andDesign Nine...

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