Page 453 - Six Sigma Demystified

a n S w e r S To q u i z z e S a n D f i n a l e x a m 433

8. d. PPI = (0.75 × 125,000)/(6,200 × 100) = 0.15.
9. d. Labor cost is saved only when it can be reassigned or eliminated.
10. c. The prioritization matrix will allow the criteria to be weighted.

Chapter 4: Define Stage
1. b. Critical factors are proposed and managed during the analyze stage. Solutions
are proposed and evaluated in the improve stage.
2. c. A work breakdown structure is used to break down big projects into smaller
projects.
3. d. A properly defined project charter should include each of these elements,
which help to boost buy-in from stakeholders.
4. c. The affected department is one of the stakeholders that should have been
identified and included in the problem solving, if not the team itself. Involving
the sponsor should be a last resort. The team needs to satisfy the department’s
legitimate concerns and help department members to understand why the
proposed solution is the best course (if in fact it is, given the department’s
concerns).
5. b. Replacing team members and asking for intervention from a sponsor would be
last resorts after considerable time has been spent on more productive means of
resolving the problems. The problems most likely could be best handled by the
ideas listed in choice b.
6. c. This best represents the concept of consensus decision making, which is
preferable to voting or mandating decisions. Effective brainstorming will allow
greater participation among the team members and yield more ideas of a higher
quality than a single person would be capable of generating.
7. b. A conflict of ideas is to be expected and is indicative of the various stakeholder
groups’ varied interests and concerns.
8. d.
9. d. Since the stated project objectives cannot be realized, the champion must
authorize deviations from the previously agreed objectives.
10. c.

Chapter 5: measure Stage
1. a. Each stakeholder group may have varied understandings of the process tasks
and objectives and has involvement in the current process inputs, tasks, and/or
outputs that is useful in documenting the as-is process.
2. d.
3. b. Defect per unit (DPU) = 300/1,000 = 0.3 = 30 percent. Throughput yield = 1
– DPU = 70 percent.
4. b. Defect per unit (DPU) = 300/1,000 = 0.3 = 30 percent. Throughput yield = 1
– DPU = 70 percent.
5. c. The process yield calculated with this method does not differentiate between
first-pass quality and quality levels after rework. It fails to consider the costs of
the hidden factory.
6. c. (0.92) = 0.973.
1/3
7. b.