CALENDAR PLANNING OF IT-SERVICES OF THE ENTERPRISE’S ERP-PROJECT

One of the important and difficult tasks of creation of Enterprise Resource Planning (ERP) of the enterprise is creation of the planned schedule of IT-services development, making the functional volume of the project by several, working groups acting in parallel. The complexity of the task, in particular, is connected with the need of coordination of planned schedules of groups among themselves caused by essential dependence of IT-services of various business processes as well as with the need for rational distribution of total amount of resources between the working groups. Mathematical statement and set of procedures of the problem solution of IT-services scheduling of Enterprise Resource Planning of the large metallurgical company is given. Each service is described by two characteristics: duration and design costs. Expenses on design depend on time of the beginning of service development. Problem definition is based on three indicators of efficiency of the planned schedule of the ERP-project: on the number of communications between separate IT service and other ERP-services, on duration of action of the design decisions made for each service and on the size of the project budget. The first two indicators are used for formation of criterion of a task which describes degree of coherence of planned schedules of the working groups, and the third is accepted as restriction of a task. The method of network programming is applied to the task solution. The method decomposes a difficult initial task on the basis of structural and similar network representation of criterion and restrictions for the sequence of significantly simpler subtasks which solution is carried out by the method of dichotomizing programming, and integration of solutions of subtasks – by means of application of consecutive composition. In article the example of the studied task solution is given in which structural and similar network representation of criterion and restrictions is described by a tree branch. The constructed planned schedule is a basis for the solution of determination problem of functional volumes of pilot testing of Enterprise Resource Planning and creation of technical structure of the corresponding test environment for the purpose of the design decisions verification made at IT-services developing.

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