Reliability Test Plan Based on Logistic-Exponential Distribution and Its Application

In this article, a reliability test plan is developed for Logistic-exponential distribution (LoED) under time truncated life test scheme. The distribution has been chosen because it can used to model lifetime of several reliability phenomenon and it performs better than many well known existing distributions. With the discussions of statistical properties of the aforesaid model, the reliability test plan has been established under the assumption of median quality characteristics when minimum confidence level P* is given. To quench the objective of the paper i.e; to serve as a guiding aid to the emerging practitioners, minimum sample sizes have been obtained by using binomial approximation and Poisson approximation for the proposed plan. Further, operating characteristic (OC) values for the various choices of quality level are placed. Also, minimum ratio of true median life to specified life has been presented for specified producer’s risk. Important findings of the proposed reliability test plan are given for considered value of k=0.75,1,2. To demonstrate the appropriateness of suggested reliability test plan is achieved using four real life situation.

Prioritize the Sequence of Test Cases and Increase the DRE Rate by Implementing Orthogonal Array Testing Strategy

Software testing is an emerging technology which is use to increase the rate of error detection as early as possible in the software testing life cycle process. Test case prioritization technique plays a crucial role in organizing the test cases in sequencing order both ascending and descending such that test cases having high priority or high severity are planned to get executed doing a proper risk-based analysis. This prioritization technique effectively addresses two important organization constraints namely “Time” and “Budget”, also improve the quality of service. The proposed work is all about how effectively we can sequence the application modules for testing during Test plan phase using fuzzy logic and how to write optimized test cases efficiently design during Orthogonal Array Test Strategy (OATS) in Test design phase of testing life Cycle.

Seismic Evaluation of RC Buildings Designed with Past Codes

Recent earthquakes have caused past reinforced concrete buildings severe damage compared to newer buildings because they have many structural deficiencies. To prevent future losses during earthquakes, the seismic capacity of these older buildings needs to be assessed with recent codes so that appropriate measures may be implemented to mitigate their vulnerability. This report compares the seismic evaluation method of two different codes on an existing building. The guidelines of two such documents by Bureau of Indian Standards (BIS) and New Zealand Society for Earthquake Engineering (NZSEE) are presented in this report. These guidelines intend to provide a systematic procedure for the seismic evaluation of buildings which may be applied reliably to a wide range of buildings. The objective of this article is to go through the documents of the Indian Standards and the New ZealandStandards on the seismic evaluation of existing buildings and compare the results of the two. Indian code IS 15988 including IS 1893:2016 Part1 providessome analytical solution for the seismic evaluation. However, these solutions may be or may not be sufficient for all types of failure, which may be overcome by using NewZealand Draft Code (NZDC). Upon comparing the results obtained from the analysis done using the two codes, one can understand the behaviour of a structure from all perspective. In the present study, analytical and manual work has been carried out and shown in a well-explained manner and easy to understand METHODLOGY 1. Visual Survey 2. Test Plan 3. Sample and Data Collection 4. Structure Stability Analysis

Reusing System of the ballast water

Increasing water consumption is a problem faced by the world; one of its solutions is reusing water. Reuse is about changing processes that result in polluted water byproducts so that the resulting water is usable again. Our major problem is to reuse unusable or polluted water. We are not treating the water, but we are changing processes to make water byproducts usable again in the same process or even a different process. Our solution is to reuse ballast water in transporting oil. Oil ships are heading from one country to another, and they are loaded with oil. These ships return to be loaded with ballast water instead of oil to prevent the risk of overturning this ship. In other words, the ballast water is used to make the ship stable which is the purpose of the ballast water to return to their original countries in peace. Our goal is to purify this ballast water mixed with oil residues by relying on the density difference. The first step is to place a source of solid air in the tanks to provide some bubbles inside the tank. Secondly, put some of the iron peels inside the tanks to stick these peels with the bubbles, then by a magnetic field attracts the pollutant bubbles attached to the iron scales, and the ballast water remains in the tank to be used again. Before writing a test plan, we demonstrated two design requirements. The first one is ballast water quality which has two parts the turbidity and oil, grease, and all extractable matter by chloroform in the water, while the second design requirement is the environmental impact. By making a test, the results were astounding because it achieved the design requirements that we put into making this project applicable for reusing this polluted water after purifying it.