The basic unit of testing object-oriented software is the class Bin94b, MK94]. Hence class testing corresponds in object-oriented software development to unit testing in the traditional, procedural development approach. As a rule, class testing is performed by the programmer of a class by himself and not by a seperate testing group, to decrease the need for coordination MK94]. But in these situ...

Abstract This paper presents case studies on application of accelerated mechanical fatigue testing for evaluation wire bond interconnects and interfaces in electronic devices. A dedicated experimental set-up is designed to induce failure the weak sites devices by reproducing modes occurring during operation. Acceleration achieved increasing frequency enabling determination lifetime curves a ver...

In testing hypotheses, we may confront with cases where data are recorded as non-precise (fuzzy) rather than crisp. In such situations, the classical methods of testing hypotheses are not capable and need to be generalized. In solving the problem of testing hypotheses based on fuzzy data, the fuzziness of the observed data leads to the fuzzy p-value. This paper has been focused to calculate fuz...

We consider a stage life testing model and assume that the information at which levels the failures occurred is not available. In order to find estimates for the lifetime distribution parameters, we propose an EM-algorithm approach which interprets the lack of knowledge about the stages as missing information. Furthermore, we illustrate the implementation difficulties caused by an increasing nu...

Should Old-Age Benefits Be Earnings-Tested? We study the welfare effects of earnings testing flat-rate old-age benefits in a quantitative overlapping generations model with idiosyncratic labor income risk. In our model economy, even a moderate earnings testing reduces individuals’ expected lifetime utility, whenever other taxes are taken into account. Moreover, it also lowers the realized lifet...