Final answer:
The specific element that distinguishes time estimation from effort estimation in project management is the focus on measuring the duration or amount of time required to complete a task or project, as opposed to estimating the effort and resources needed.
Step-by-step explanation:
The specific element that distinguishes time estimation from effort estimation in project management is the focus on measuring the duration or amount of time required to complete a task or project. Time estimation is concerned with determining the amount of time it will take to complete a specific activity, while effort estimation focuses on estimating the amount of effort, resources, and manpower required to complete the task.
For example, if a project manager is estimating the time required to develop a software application, they would consider factors such as the complexity of the application, the number of features to be developed, and the skill level of the team members. On the other hand, in effort estimation, the project manager would focus on estimating the number of hours, labor costs, and other resources that would be required to complete the project.
Overall, while time estimation focuses on measuring the duration or amount of time required, effort estimation is concerned with estimating the resources and manpower needed to complete a task or project.