动态并行技术应用对开发项目可管性的影响

使用并行工程技术可以收缩项目的开发周期，但同时也往往使项目管理变得更困难．然而，并行技术的应用与项目可管性之间的关系目前还没有被很清楚地认识．用并行程度和并行关系屈曲度作为动态并行工程技术应用程度的二个测量，使用流程工作序列加速标准差来度量项目的可管性．用单阶段项目开发的系统动力学模型，分别对线性和非线性并行关系进行分析．发现当并行关系为线性时，开发项目会比非线性关系更容易管理；与此同时，当并行关系由线性变为非线性时，动态并行技术与可管性的关系将会变得难以预期．这个结果提高了对动态并行技术与开发项目可管性关系的理解．

Investigation of Impacts of Dynamic Concurrence on Development Project Manageability

Shrinking cycle time with concurrent engineering can make projects more difficult to manage .However,the extent ,nature and conditions of the causal relationship between concurrence and manageability are not well understood. This study uses Degree of Concurrence and Degree of Concurrence Relationship Curvature as two measurements of dynamic concurrence based on Process Concurrence Relationship,an improved tool for describing and modeling concurrence,and uses the standard deviation of Process Work Queue Acceleration as Manageability Index to model project manageability. Single-phase development process model is applied as a data collection tool to investigate the causal relationship between concurrence and manageability. Two hypotheses were developed to test the causal relationship separately with the two different experiments--Linear and Nonlinear. The study finds a significant inverse relationship between degree of concurrence and project manageability with linear concurrence elationship. When the concurrence relationship was changed from linear to nonlinear the relationship became quite unexpected. The results improve the understanding of the causal relationship between dynamic comcurrence and manageability.