Verification of Design

The basic design needs to be confirmed by the customer. Does the proposed part actually look like what is required, and will it fit into the rest of the equipment if it is part of a larger assembly If not previously discussed with the supplier, any potential trouble points like sharp corners or butt joints should be brought to the attention of the customer and the potential problems resolved. If the part is a noncritical item or if there is knowledge available from previous similar items, the part can be evaluated by the customer. Flexibility, deformation under load, and correct functioning in an assembly can be verified using the part. 

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Verification of design through data and calculation checks and validation of design through prototype tests, where applicable... 

Work on the High Flux Reactor,continued at ORNL during early 1948, and also at ANL toward the latter part" of 1948- Further critical experiments for the verification of design choices and the design and construction of the High Flux Reactor mock-up were carried on at ORNL- - The critica-l experiments... 

Refinement for Formal Verification of Design Steps (Using Event-B)... 

USNRC Generic Letter 96-05, Periodic verification of design basis capability of safety related motor operated valves. 

FIG. 57. Objective tree for Levels 1-3 of defence in depth. Safety principle (255) verification of design and construction. 

CRIOP is used in verifications of design, manning, organisation and emergency preparedness to ensure that these are adequate from a human decision-making point of view. When applied in the detail-engineering phase,... 

Type tests are conducted on the first enclosure of each voltage, current rating and fault level to demonstrate compliance with electrical and constructional design parameters. The tests provide a standard reference for any subsequent enclosure with similar ratings and constructional details. The following tests may be conducted to demonstrate verification of the following ... 

A. Schock, Design evolution and verification of the general purpose heat source. In Proc. o/15th Intersociety Energy Conv. and Eng. Con/., vol. 2, ASME, New York, 1980, pp. 1032 1042. 

The techniques of design verification identified in clause 4.4.7 can be used to verify that the design output meets the design input requirements. However, design verification is often an iterative process. As features are determined, their compliance with the require-... 

A schedule of design reviews should be established for each product/service being developed. In some cases there will need to be only one design review after completion of all design verification activities. However, depending on the complexity of the design... 

The standard requires that at appropriate stages of design, design verification shall be performed to ensure that the design stage output meets the design stage input requirements. 

The standard creates a distinction between design verification and design validation. There are two types of verification those verification activities performed during design and on the component parts to verify conformance to specification and those verification activities performed on the completed design to verify performance but more on this later. 

The standard does not state when design verification is to be performed although appropriate stages implies that verification of the design after launch of product into production would not be appropriate. 

Verification of some characteristics may only be possible by calculation rather than by test, inspection, or demonstration. In such cases the design calculations should be checked either by being repeated by someone else or by performing the calculations by an alternative method. When this form of verification is used the margins of error permitted should be specified in the verification plan. 

Prepare procedures for the conduct of design verification activities. 

Design verification and design validation are both activities related to investigations of the performance of the developed device. However, there are important features that distinguish them from each other ... 

A schematic representation of the relationship between design verification and design validation and their interaction with other design activities is shown in Figure 9.13. 

EC Type-examination Certification Certification of design based on testing of physical samples versus standards/essential requirements EC Verification Certification... 

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