Answer: Bottom- up planning
Explanation:
The bottom-up planning is one of the type of approach that helps in defining the specific aim that helps in achieving the given target with the helps of proper planning process.
It is the process of developing the various types of planning process by managing the all the levels of organization for achieving the desirable goals or task.
According to the given question, the bottom- up planning in which the manager of the form are required to estimating the actual needs of the products based on the available resources.
Therefore, Bottom- up planning is the correct answer.