Abstract
This Chapter introduces the basics of project modelling and planning, particularly the Work Breakdown Structure (WBS) that divides the project work into its work packages and activities. We present different types of WBS with examples and demonstrate their impacts on project execution using Gantt Charts. We introduce organizational and cost breakdown structures, associate them with WBS and discuss the estimation of activity duration and cost values and technical and resource requirements. These data provide the foundation for the network modelling that lies at the core of project scheduling practice, highlighting the importance of data requirements, data and knowledge management.
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