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PlanningAmong other things, the goal of the inspection, the work results thatare to be inspected, and the roles and participants are determined duringthe planning phase.OverviewIn the overview phase, the author explains the requirements to beinspected to all team members so that there is a common understandingabout the requirement among all inspectors.Error detectionIn the error detection phase, the inspectors search through therequirement for errors. Error detection can be performed individually byeach inspector or collaboratively in a team. Individual inspection has theadvantage that each inspector can concentrate on the requirements. Onthe other hand, team inspections have the advantage that communicationbetween the inspectors creates synergy effects during error detection.During the course of error detection, any errors that are found are purpo-sively documented.Error collection andconsolidationIn the error collection phase, all identified errors are collected, consol-idated, and documented. During consolidation, errors that have beenidentified multiple times or errors that aren’t really errors are identified.The latter can be the case if, for instance, an inspector makes wrongassumptions about a requirement or interprets some constraint the wrongway. Along with consolidation, the identified errors and correcting meas-ures are documented in an error list. Inspections are also known as techni-cal reviews.Roles during inspectionFor an inspection to be performed, the following roles must be staffedwith suitable personnel:
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7.5Requirements Validation Techniques99Organizer:The organizer plans and supervises the inspection process.Moderator:The moderator leads the session and ensures that the pre-determined inspection process is followed. It is advisable to select aneutral moderator because the moderator could potentially balanceout opposing opinions of authors and inspectors.Author:The author explains the requirements that he created to theinspectors in the overview phase and later on is responsible for correct-ing the errors identified.Reader:The reader introduces the requirements to be inspected suc-cessively and guides the inspectors through them. The role of thereader should be given to a neutral stakeholder so that the inspectorscan center their attention on the requirements instead of on the inter-pretation of the author. Often, the moderator is also the reader.Inspectors:The inspectors are responsible for finding errors and com-municating their findings to the other members of the project team.Minute-taker:This person takes minutes of the results of the inspec-tion.7.5.3Walk-ThroughLightweight reviewIn requirements validation, a walk-through is a lightweight version of areview. A walk-through is less strict than an inspection and the involvedroles are differentiated to a lesser degree. During a walk-through, at leastthe roles of the reviewer (comparable to the inspector), author, andminute-taker, and potentially the moderator, are staffed.
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