Defining Activities

Correct Answer: Fast tracking

Fast tracking is the correct technique to use when you want to overlap activities that would normally be done in sequence in order to compress the project timeline. On the other hand, the Program Evaluation and Review Technique (PERT) is not the best choice because it deals with uncertainty in the project schedule and does not primarily deal with overlapping activities. The Critical Chain Method (CCM) focuses on resource management and ensuring that the most important tasks are delivered first, but it doesn't inherently involve overlapping tasks to save time. Lastly, resource leveling deals with resolving over-allocation of resources in the project schedule and would not directly help in achieving the desired outcome of saving time by overlapping activities.

Correct Answer: Apply the Lead Time concept to start testing as soon as possible.

In Project Management, applying the Lead Time concept means starting an activity before its dependent activity is completed. In this case, it implies that testing of the mobile application can begin even before all development activities are done, thus speeding up the process and possibly identifying potential issues simultaneously while the rest of the development is still ongoing. The other options are either inefficient or incorrect in an Agile working environment. 'Postponing the app testing until all development activities complete' would delay potential troubleshooting and problem resolution that testing could find. 'Ignoring the development and focusing only on testing' wouldn't be possible because there wouldn't be anything to test without a developed product. Lastly, 'Using Lag Time to delay the start of testing activities' is the exact opposite of what the project team wants. Instead of delaying, the team needs to apply a method that could cater to starting the testing activities sooner.

Correct Answer: When the project details are not clearly defined at the start.

The Rolling Wave Planning technique is most effectively used when the details of the project aren't clearly defined at the beginning. This technique involves planning in waves as the project unfolds and more information becomes available. The other answers are incorrect for the following reasons: a strict project schedule doesn't accommodate the flexibility provided by the Rolling Wave Planning approach. Knowing all the project activities at the start contradicts the key advantage of this technique, which is to deal with uncertainty and unknowns in the early stages of the project. Lastly, the level of experience of the project team is irrelevant to whether this planning approach should be used.