Final answer:
To calculate task duration, Drew requires information about resource availability and task complexity, not the cost of resources. Creating a timeline can aid in visualizing the schedule and handling tasks that occur simultaneously.
Step-by-step explanation:
When Drew is assigning resources to tasks and attempting to calculate task duration, he needs specific pieces of information. These include the number of resources available, the complexity of the tasks, and other factors. However, the cost of the resources does not directly help him calculate how long tasks might take. It's more related to budgeting rather than the timeline estimation.
It is useful to analyse the problem and identify all given information. Drew can create a timeline, which can visually represent the scheduling of tasks and resources. This timeline will help him see overlapping tasks and better estimate total task duration.
Understanding that tasks might be happening in parallel is crucial because the sum of individual task durations does not equal the total project duration if multiple tasks are happening simultaneously.