According to Clark and Wheelwright, an individuals percent of time spent on value-adding tasks is maximized when the person performs:


  1. 4 tasks
  2. 2 tasks
  3. 8 tasks
  4. 6 tasks

Correct Answer



Multi-tasking exacts a horrible toll on productivity. Clark and Wheelwright (1993) studied the effect of multi-tasking and found that the time an individual spends on value-adding work drops rapidly when the individual is working on more than two tasks. [Cohn, M., 2006. Agile Estimating and Planning. 1st ed. Massachusetts: Pearson Education. Page 15]

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