The Research On The Plan Of Construction Net-Work Under Rough Set And Unascertained Set

There is inherent attributes like long cycle ,large amount of investment , complicated influential factors and so on in construction. Which undoubtedly makes it more difficult to do construction management. The construction management is strengthened by applying network plan technique. Consequently, whether the composition for construction network plan is well done and complying to the objective actual situation or not are concerning the whole project's management effect.During the course of construction, there will be various indefinite factors which will have positive or negative influences on the construction of item project. The actual situation is considered in the course of project construction, which based on clarifying the concepts of construction network plan and project item management. The various potential indefinite factors is analyzed in the execution of project item and its relationships with the factors affecting the safety, quality and resource.Some relevant problems among each quota are considered in the quota system. The primary indefinite factors which affecting the target of project management is obtained by the method of Rough set. Thus the management target of item is better reflected by making the selected valuation quota.Then the unascertained mathematics is applied in obtaining the influential degree that the primary indefinite factors cause to the construction period. Each procedure's construction time that is reconciled with the reality and takes account of every management target. By combining the result of quantified results with traditional CPM to obtain the construction network plan under the influential of comprehensive factors.