A project is an integrated whole unit into which'hundreds of tasks and thousands of work elements are integrated. So, work programming has to be done if the interrelationship of work in mind. Interfacing of the models will establish the interrelationship. It must be possible to carry out many work telekinesis independently upto their assembly stage, but in a project with a few hundred thousandth identifiable work elements, one cam lot afford to leave half of them executed out-of-sequence and wait for mass finishing assembly, connections and testing towards the and of the project. That would cause a lot of confusion, wastage, lock up of money and all most cases,mobilizations and even some re-works. Moreover, in a huge project, different work packages may have different phased-out commissioning dates for technical and financial results, necessitating a corresponding phased-out completion of work. Besides, for economic or technical reasons, some segments may have to be accomplished on priority over others. For these reasons, sequence and priority have to be given due consideration while programming.
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