Final answer:
Option 'd' is NOT true of work packages as they are typically distinct elements and should not modify one another; they are managed and coordinated in the project's Work Breakdown Structure.
Step-by-step explanation:
The subject of the question pertains to work packages within the context of project management. Work packages are a key concept in project planning and execution. Addressing the provided options:
- a. The project manager should be able to track all work packages - This is true as it is vital for effective project management.
- b. A work package may include several milestones - This is also true; work packages can contain multiple milestones that mark significant points within the package.
- c. A work package has one owner - This is true and ensures accountability and clarity in the delegation of tasks.
- d. One work package may modify another - This statement is generally NOT true since work packages are defined with specific scopes and objectives and should not interfere with one another.
Therefore, the correct answer is 'd'. Work packages are usually distinct elements of a project, and one should not modify another. Instead, they should be coordinated and integrated at higher levels of the project's Work Breakdown Structure (WBS).