Consider the following system diagram of a simple heating system:
a. Name two (2) feed backs contained in this system. Explain your answer.
b. List the black boxes in this system. Explain your answer.
c. In this system, the thermostat is modeled as a subsystem. Must the thermostat be considered an open or a closed subsystem? Explain your answer.
Question 2
a. What is the Clark-Fisher hypothesis.
b. How does the Clark-Fisher hypothesis offer an explanation for the dramatic shifts in the US labor market since 1800; from agriculture and mining to manufacturing, and from manufacturing to services?
Consider three (3) production processes; A, B, and C and their quality performance relative to the lower and upper specification limits. We assume that the lower specification limit (LSL) is set at 25.0 and the upper specification limit is set at 75.0.
a. Which of these processes has the highest Cp? Explain your answer.
b. Which of these processes has the highest Cpk? Explain your answer.
c. If we ignore process A and we assume that the LSL is 60 and the USL is 70, which of the following strategies should we apply?
• Strategy 1: Try shifting both processes B and C so that they become centered on 60; then try reducing their variance.
• Strategy 2: First try reducing the variance of processes B and C; then try shifting them so that they become centered over 60.
