Study Of Project Scheduling Management Methods With Application

Nowadays there are some problems in project scheduling management, such as time or cost overflowing, critical resource scarcity or conflicting, and so on. So some theories and methods including probability theory, fuzzy theory, theory of constraint (TOC), network planning technique, dependency structure matrix (DSM), and simulation technique are inducted to treat with those problems in the dissertation. By virtue of these, some aspects on drawing scheduling, duration indeterminacy, resource-constrained scheduling (RCS), complicated activity relationships and shorting project period are separately comprehensively studied.About drawing scheduling, some frequent mistakes including incomplete, superficial, more cursory or more specific, lacking in risk appraisal, inadequate for buffer sizing are deeply analyzed in the dissertation. The fact is emphasized that people related to project should be required participating directly, and concrete steps of drawing scheduling are presented.About indeterminacy of activity durations, effect factors-based stochastic network planning model is proposed, which looks upon indeterminate activity durations as every independent factors effecting results. This method not only may describe activity durations stochastic indeterminacy but also reveal dependent relationships among activity durations under the same indeterminate factors effecting, and breaks out hypothesis on activity durations independency in traditional models. Otherwise, improved fuzzy network planning model is proposed to cope with fuzzy activity durations and shortcoming of computing floats in traditional methods. Statistical mean is introduced to quantify and compare different fuzzy number, and put forward new definitions of fuzzy number operations in the improved method. Having calculated activity's earliest time parameters, activity's floats are worked out directly, which avoids embarrassment of negative time parameters.About resource-constrained scheduling (RCS), an improved resource link-based resource-constrained scheduling (RL-RCS) model is proposed. By pursuing resource used in and transferred among activities resource links among activities are set up in the model, with integrity of recognizing dependency on resources guaranteed, and inaccurate activity floats, inconsecutive critical path, unstable activity executing sequence, singleness of scheduling, and incomplete recognition of activity resource links all solved. Additional analysis of necessity of setting up resources links and influence of resource links on calculating activity floats is made. Furthermore, investigations are carried out into recognition of substitutions and redundant relationships among activities. Because of some drawbacks of current network planning techniques in disability to describe rich relationships among activities and to reflect potential iteration and learning attribute during activity execution, dependency structure matrix (DSM) -based project scheduling model is proposed. In the model, activity relationships of DSM (R-DSM) is employed to describe not only sequential and parallel relationships but also overlapping and time-window constraint-dependent relationships among activities, and activity probability of DSM (P-DSM) is used to compatibly describe iteration and learning ability during activity execution. At last, concrete procedures are given to calculate project period by virtue of parallel discrete events-based simulation method.About critical chain project management (CCPM), an improved buffer sizing method is proposed. Effects of project resource intensity, network structure complexity and managers'attitude to risks on buffers are all analyzed and integrated in the method, which makes buffers sizing even more applicable. Furthermore, concrete steps are given to execute CCPM, and comprehensive analysis of CCPM is made, with activity duration estimated, buffer estimated, inserted and monitored, critical chain established and updated, multi-tasking implemented and management concepts changed.At last, related software is developed in VisualStrudio.NET language, and system frame and class structure model based on object-oriented ideas are given. Moreover, some techniques are also demonstrated including layout of activity-on-node network by computer aided design, interface programs with Access database, AutoCAD software and Excel table.