You are leading a research project that will require between 10 and 20 aerospace engineers. Some senior-level aerospace engineers are available. They are more productive than junior-level engineers, who cost less and who are available as well. You want to determine the optimal combination of senior- and junior-level personnel. In this situation, the appropriate technique to use is to—

a. Conduct a design of experiments

b. Use the Ishikawa diagram to pinpoint the problem

c. Prepare a control chart

d. Analyze the process using a Pareto diagr