These antibodies could be acquired by;1. Infection by measles viru.pdf

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These antibodies could be acquired by; 1. Infection by measles virus. 2. Vaccination for measles virus. 3.infection by some other strain of virus which closelyrics resembles measles virus. Solution These antibodies could be acquired by; 1. Infection by measles virus. 2. Vaccination for measles virus. 3.infection by some other strain of virus which closelyrics resembles measles virus..

1) Now we consider that the product is lawnmower. Validation tests include the scenarios in which the product will work or not and this process is done by the product managing team itself. Does it cleans even? What happen when suddenly power is off? How much far we can move it? How much time it takes for a particular unit ? These all are some tests including in the validation tests... Verification tests, It includes verifying whether the build the right product. Following are few tests that can be included: What happens if stone is there? What if there is raining? How it works in an uneven place? These are few tests to be conducted under verification... 2) 1. REQUIREMENTS A documented software requirements specification provides a baseline for both validation and verification. The software validation process cannot be completed without an established software requirements specification (Ref: 21 CFR 820.3(z) and (aa) and 820.30(f) and (g)). 2. DEFECT PREVENTION Software quality assurance needs to focus on preventing the introduction of defects into the software development process and not on trying to \"test quality into\" the software code after it is written. Software testing is very limited in its ability to surface all latent defects in software code. For example, the complexity of most software prevents it from being exhaustively tested. Software testing is a necessary activity. However, in most cases software testing by itself is not sufficient to establish confidence that the software is fit for its intended use. In order to establish that confidence, software developers should use a mixture of methods and techniques to prevent software errors and to detect software errors that do occur. The \"best mix\" of methods depends on many factors including the development environment, application, size of project, language, and risk. 3. TIME AND EFFORT To build a case that the software is validated requires time and effort. Preparation for software validation should begin early, i.e., during design and development planning and design input. The final conclusion that the software is validated should be based on evidence collected from planned efforts conducted throughout the software lifecycle. 4. SOFTWARE LIFE CYCLE Software validation takes place within the environment of an established software life cycle. The software life cycle contains software engineering tasks and documentation necessary to support the software validation effort. In addition, the software life cycle contains specific verification and validation tasks that are appropriate for the intended use of the software. This guidance does not recommend any particular life cycle models - only that they should be selected and used for a software development project. 5. PLANS The software validation process is defined and controlled through the use of a plan. The software validation plan defines \"what\" is to be accomplished through the software validation effort. Software validation .

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