Requirements validation is a critical phase of requirements engineering processes, which makes sure that requirements are correct, consistent, complete and accurate. Requirements validation is used in determining the right requirements, while verification determines that implementation is correct with respect to its requirements. The main objective of validation is to certify that requirement specification document is the acceptable description of the system, which is going to be implemented. Requirements validation techniques (RVTs) play pivotal role to detect possible defects in the requirements. RVTs can help in the completion of projects, within given schedule, budget and according to the desired functionality. The studies of six companies regarding requirements validation, is presented in this thesis. This study explores the requirements validation techniques that are presented in academia and practiced in industry as well. Interview studies are conducted in two countries, which is an attempt to find the usage of requirements validation techniques in both of the countries. The pros and cons of identified RVTs are discussed, along with it; the comparison of different RVTs with respect to the satisfaction level of specific RVT in terms of catching defects, time/schedule and cost is presented as well.

Context: Requirement validation is a phase of the software development life cycle where requirements are validated to get rid of inconsistency, incompleteness. Stakeholders involved in the validation process to make requirements are suitable for the product. Requirement validation techniques are for validating the requirements. Selection of requirements validation techniques related to the factors that need to consider while validating requirements makes the validation process better. This paper is about the factors that influence the selection of requirements validation technique and analyzing the most critical factors. Objectives: Our research aim is to find the factors influencing the selection of requirements validation techniques and evaluating critical factor from the factors list. To achieve our goal, we are following these objectives. To get a list of validation techniques that are currently being used by organizations, and to enlist the factors that influence the requirements validation technique. Methods: To identify the factors influencing the selection of requirement validation techniques and evaluating the critical factors, we conducted both a literature review and survey. Results: From the literature review, two articles considered as our starter set, and through snowball sampling, a total of fifty-four articles were found relevant to the study. From the results of the literature review, we have formulated a questionnaire and conducted a survey. A total of thirty-three responses have gathered from the survey. The survey obtains the factors influencing the requirement validation techniques. Conclusions: The factors we got from the survey possess a mixed view like each factor has its critically in different aspects of validation. Selecting one critical factor is not possible during the selection of the requirements validation technique. So, we shortlisted the critical factors that have more influence in the selection of requirement validation techniques, Factors, Requirements validation techniques.

In software engineering the requirements validation has very core importance. The requirements validation very helpful to judge that software requirements specification (SRS) is complete and free of bugs. The requirements validation is a assurance that the software requirements document is free of unwanted requirements and completely consistent. In order to remove inconsistency, detect defects and make the software requirements document fully functional the requirements validation is key factor. All possible requirements validation techniques available in academia such requirements reviews , requirements prototyping, requirements testing and viewpoint-oriented requirements validation are explained properly in this thesis report. In a very readable and understandable way the thesis presents all pros and cons of these requirements validation techniques practiced in different software companies in Sweden and available in academia. This report explains all possible advantages and issues related with these RVTs. In order to judge the best performance of these RVTs and to make their comparison I used a proper channel. I have designed a very effective survey questionnaire with the help of my colleges and literature review. To make creative comparison I conduct interviews and send survey questionnaire to different people working in requirements engineering departments in different software industries in Sweden. Finally the satisfaction levels of different software industries with these requirements validation techniques presents in this thesis report. These variables such as defect detection, time and cost are used to measure the satisfaction levels. / I Software Engineering kraven validering har en mycket central betydelse. Den kravvalidering very helpful att bedöma att Kravspecifikation (SRS) är klar och felfria. Kraven validering är en garanti för att programvaran kravdokument är fri från oönskade krav och helt konsekvent. För att undanröja inkonsekvens, upptäcka brister och göra programvaran kravdokument fullt funktionella kraven validering är viktig faktor. Alla möjliga kravvalidering tekniker inom den akademiska sådana krav recensioner, krav prototyper, provning och synpunkt-orienterade kravvalidering förklaras ordentligt i denna avhandling rapport. I ett mycket lättläst och begripligt sätt avhandling presenterar alla fördelar och nackdelar med dessa krav validera metoder praktiseras i olika mjukvaruföretag i Sverige och finns i den akademiska världen. Denna rapport förklarar alla möjliga fördelar och frågor kring dessa RVTs. För att bedöma de bästa resultaten i dessa RVTs och göra en jämförelse av dem använde jag en riktig kanal. Jag har skapat en mycket effektiv frågeformulär med hjälp av min högskolor och litteraturgenomgång. Skapa kreativa jämförelse jag intervjua och skicka frågeformuläret till olika personer som arbetar inom tekniska kraven för dessa avdelningar i olika programvaruföretag i Sverige. Slutligen tillfredsställande nivåer av olika programvaruföretag med dessa krav validering teknik presenteras i denna avhandling rapport. Dessa variabler såsom Upptäcka, tid och kostnader används för att mäta tillfredsställande nivåer. / Author: Latif Hussain Sulehri E-mail: latifsulehry@hotmail.com Phone: +46 704 917 140