Abstract: The total test time devoted to reliability growth testing shall be based on the r eliabilitygrowth model, the experience of the contr actor, and the quantitative requir ements of the item's proposedin the reliability specification. This paper first introduces proposed the total test time duringthe growth test program refer ences at home and abroad. And the calculative formulation of the total test time is deduced and a now algor ithm is presented on the basis of Duane reliability growth model.Analyses ar emade of the definite principle to determine and method to calculate the Duanc growthmodel paraqmeters, for example, the growth rate, the star ting point, required MTBF, and so forth.Finally the optimum number and calculation are given to show that the met hod is more accur ate thanconventional approximate methods.

Key words: reliability, growth, test, models