Statistics for Six Sigma Made Easy

13.1.

13.1.1. Additional Practice Problems

Problem #6

A software company has a development group of 10 people whose primary job is to write code. However, on a rotating basis, they also answer user questions related to past programs. Since many of the code-writers would prefer just writing code, the company wants to know if the time spent answering these questions justifies assigning a person whose sole function would be to answer questions, not write code. Since the new position would involve taking a person away from the development group, management wants to make sure it would be freeing up at least 10% (one person) of the time of the current group. Although the manager is not sure what percentage of time is being spent on answering questions, ...