Agroup within a portfolio comprised of subprograms, projects or other work that are managed in a coordinated fashion in support of the portfolio is known as

Program

Explanation: Program is basically a collection of projects and sub programs. The management of this group of related projects is more useful than managing the individual projects. Program manager keeps track of the program. Program focuses throughout on the organisation benefits and needs for which it was initiated. For example in a vehicle company the design of a specific car is a program and its parts like engine, brakes, bonnet etc are called projects.  

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