By Prof. L. Valadares Tavares (auth.)
More than 40 years have handed because the early makes an attempt to version tasks. a wide area of theoretical advancements has grown generating a excessive variety of analytical and numerical effects, however it turns out that the most version continues to be an analogous: the concept that of undertaking community. this idea has come to symbolize the 2 significant positive aspects underlying the proposal of a undertaking: the sequential and the aggressive nature of its parts, the project's actions. truly, the sequential estate defines the constitution of the venture and the aggressive nature stems from using universal assets (facilities, items, gear, administration, etc.) to hold out different actions. even though, major advances were completed in venture modelling, permitting the construction of even more strong effects: A. the idea that of priority and the outline of actions has been generalized to provide a variety of lifelike illustration of initiatives. B. the stochastic examine of the positive aspects of initiatives reminiscent of the length and value in their actions is conducted by way of a number of analytical and numerical types, permitting experimental and forecasting analyses. C. the allocation of assets will be now studied for extra complicated events and regulations. D. the monetary description of initiatives is extra adequately studied and its optimization is punctiliously pursued. E. the overview and the review of tasks now should be studied in the framework of multicriteria choice thought contemplating a number of views and aiding the venture supervisor to pick the main acceptable compromises among possibility, time and anticipated gains.
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Extra info for Advanced Models for Project Management
Tills means that an indicator to measure this type of difficulty (project hardness) can be proposed: H=~~N(i) Ni=l where N(i) is the total number of activities preceding i. Then. H represents the average number of precedent activities for each activity of the project network.
The first problem corresponds to the ordering of N objects (starting times) and the second one to an allocation problem to distribute a total cost, C, by N components. A very long list of heuristics has been developed to determine its optimal solution as will be studied in Chapter 6. 3 STRUCTURAL MODELLING OF PROJECTS NETWORKS 1. Hardness and complexity The project network describes the restrictions of sequentiality to be respected and it represents one of the major problems faced by project managers.
__ Series-network ~> O--~> 0 --~> ... 4 EXAMPLES OF SERIES-NETWORK AND OF PARALLEL-NETWORK The concept of precedence adopted so far implies that the start of i is conditioned by the end j. (Type CD). However, this concept can be generalized to cover three other situations: Type® End of j Type® Start of j --+ Start of i Type@ Start of j --+ End of i --+ End of i Basic models for project management 27 These new types are now easily represented adopting AoN and decomposing each activity into its start, its development and its end (Fig.
Advanced Models for Project Management by Prof. L. Valadares Tavares (auth.)