15 18. b. Integrate subcomponents

The key words in this question are a number of contractors. This means the WBS is developed by integrating subcomponents that are developed from outside of the project team, such as the use of contractors. The contractor or seller then develops its WBS from the supporting contract WBS as part of the contracted work. The various subcomponents are then incorporated to form the project's WBS. (Planning)

19. d. Data analysis

Data analysis is the tool and technique for Control Scope. It consists of variance analysis and trend analysis. Variance analysis compares the baseline to the actual results and whether the variance is within the accepted threshold. Its purpose is to see whether corrective or preventive action is needed. Trend analysis evaluates project performance over time to assess if performance is improving or is deteriorating. (Monitoring and Controlling)

b. Nominal group technique

20.

The nominal group technique enhances brainstorming with a voting process, which is used to rank the most useful ideas for further brainstorming or for prioritization. It is an interpersonal and team skill as a tool and technique in Collect Requirements. In this approach, people who are participating receive a question or problem, and each person in silence generates and writes down his or her ideas. Next, the moderator writes down the ideas and records them typically on a flip chart. The people involved then discuss each recoded idea until they understand it. Finally, people vote privately to prioritize the ideas and may use a scale such as one to five, where one has the lowest interest, and a five has the highest interest. Voting follows and may take several rounds to reduce the number of ideas and focus on the ones with the highest votes. After each round, the moderator tallies the votes and the