在确定软件最佳投放时间时的风险控制-南京师范大学学报（工程技术版）

文章信息/Info

Title:: Optimal Release Policies for Software Systems under Principles of Incorporating Safety

Author(s):: ZHOU Xiuqing~¹; ZHAO Jin~²; 1.School of Mathematics and Computer Science,Nanjing Normal University,Jiangsu Nanjing 210097,China;2.Department of Mathematics,Nanjing University,Jiangsu Nanjing 210093,China

Keywords:: softw are release policy; sa fety-first pr inc iple; J-M mode; l probabilistic constra ined program

摘要:: 为了克服平均成本最小原则无法控制风险的缺点,达到规避风险的目的,针对软件的最佳投放时间的确定,提出了“安全第一”的原则,该原则将风险控制作为首要目标.将安全第一准则与平均成本最小原则相结合,提出了一种新的决定软件最佳投放时间的混合策略,使用该混合策略,既可以保证较低的平均成本,又可以适当地控制风险。在这种新的策略下,软件最佳投放时间的决定转化为一个带概率约束的最优化问题,该问题是可解的.并且在J-M模型下,将该约束随机规划问题近似地转化成了常规的最优化问题.最后,用一个实例说明了这种新的策略的应用.

Abstract:: To overcom e the shortcom ing s of the pr inciple o fm inim izing the cost expectation, and to take the risk contro l into consideration in dec id ing the optim a l re lease tim e o f softw are, a pr incip le o f “ sa fety-first” is proposed. A new hyb rid princ ip le is proposed by incorporating the cost expecta tion princ ip le w ith the safe ty- first princ ip le. By the new hybr id princ ip le, the cost expecta tion and the risk can be contro lled at the sam e tim e. Under the new princ ip le, the optim a l release tim e problem s turn out to be probab ilistic constra ined program s in stochastic prog ramm ing and the so lution procedures are ava ilab le. The stochastic prog ramm ing prob lem is reduced to a norm a l programm ing prob lem w hen the hybrid princ ip le is applied to J-M m ode .l F ina lly, a num er ica l ex am ple is presented