What is Function Analysis System Techniques (FAST)? Briefly explain the steps used in constructing the FAST diagram. Discuss the benefits and drawbacks of FAST diagram.  

Function Analysis System Techniques (FAST) is a structured method used for analyzing and representing the functions of a system or process. It provides a visual representation of how different functions interact and contribute to the overall objective. The FAST diagram is a powerful tool that helps in understanding and improving the performance of a system.

Steps in Constructing a FAST Diagram:

1. Identify the Main Function: The first step in constructing a FAST diagram is to identify the main function or objective of the system or process being analyzed. This is the ultimate goal that the system aims to achieve.

2. Break down the Main Function into Sub-Functions: Once the main function is identified, it is further broken down into sub-functions. These sub-functions represent the different steps or ______ ________ _________ _________ _____ __________ _________ ____.
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