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Worker Productivity Comparison and Method Improvement

This chapter provides solutions to textbook homework problems related to worker productivity and method improvement, including calculations and comparison of productivity ratios. It also addresses errors in the text solution and suggests the correct approach.

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Worker Productivity Comparison and Method Improvement

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  1. Chapter 2 Solutions to Text Book Homework

  2. Problem 1 • LP(1) = Output/Input = 1000 labels/30 min. = 33.3 labels per minute • LP(2) = 850 labels/20 min. = 42.5 labels per minute • Worker 2 is more productive.

  3. Problem 1- Extra • Worker 2 is how much more productive than Worker 1? Worker 2 is 28% more productive than Worker 1.

  4. Problem 5 • LP(Old) = Output/Input = 3 walls/45 min. = .07 walls per minute • LP(New) = 2 walls /20 min. = .10 walls per minute • The new method is more productive. • Better to express answer in “hours.”

  5. Problem 5 (Answer in “hours” • LP(Old) = Output/Input = 3 walls/(3/4hr.)= 4 walls per hour • LP(New) = 2 /(1/3 hr.) = 6 walls per hour • The new method is more productive.

  6. Problem 7 – Error in Text Solution • Text book solution to (a) is number of nondefective units produced per month. • What’s missing? • Nondefective units produced is the output. • The inputs used to produce this output are missing – that is, not used to compute the productivity ratio. • Only input given is labor hours, so we should use it and compute labor productivity.

  7. Problem 7(a) Under the old method, the company produced, on average, 105.3 nondefective containers each month per labor hour used.

  8. Problem 7(a) Under the new method, the company produced, on average, 142.1 nondefective containers each month per labor hour used. The new method is more productive.

  9. Problem 7(b) The new method is 34.9% more productive than the old.

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