Standards verification

Verification tests generally comprise tests other than leaching tests. They usually comprise checks on pH, appearance, odour and occasionally analysis of the total concentration of contaminants in a material. They may comprise shortened compliance type tests. There are no standard verification type tests that are used widely but CEN is developing such tests. 

System safety and human factors integrated into the set of typical system engineering tasks. Standard verification and validation activities are not shown as they are assumed to be performed throughout the whole process, not just at the end where they are often concentrated. 

The standard format specification should be complemented by release of programs for standard verification. 

Subroutine VLDTA2. VLDTA2 loads the binary vapor-liquid equilibrium data to be correlated. If the data are in units other than those used internally, the correct conversions are made here. This subroutine also reads the estimated standard deviations for the measured variables and the initial parameter estimates. All input data are printed for verification. 

Periodical Verification of Ultrasonic Flaw Detectors According to European Standardization. 

The standards concerning the verification of ultrasonic equipment for non destructive testing, which are currently applicable in European countries consist in texts from different origins, such as German (DIN) British (B.S.), Italian and French (AFNOR). 

The verifications can be performed by the user himself, with electronic measurement equipment described in this project. The consequences of the application of future European standard are very important since is established a mandatory verification of each particular flaw detector, at least once a year. Their verification is to be performed according to a well defined procedure of measurement, including acceptance criteria for each parameter. 

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 ... 

The standard requires that the supplier identify resource requirements for management, performance of work, and verification activities and provide adequate resources. 

Generically there are two types of requirements defining requirements and verification requirements. Defining requirements specify the features and characteristics required of a product, process, or service. (Within the standard these are termed specified requirements.) These may be wholly specified by the customer or by the supplier or a mixture of the two. Verification requirements specify the requirements for verifying that the defining requirements have been achieved and again may be wholly specified by the customer or by the supplier or a mixture of the two. With verification requirements, how-... 

Verification requirements are not limited to product/service features and characteristics. One may need to consider who carries out the verification, where and when it is carried out, and under what conditions and on what quantity (sample or 100%) and standard of product (prototype or production models). 

The standard requires the supplier to verify that changes are validated (including all subcontractor changes) and, when required by the customer, additional verification/ identification requirements shall be met. 

The standard requires the supplier to provide appropriate technical resources for tool and gage design, fabrication, and verification activities, establish a system for tooling management, and implement a system to tack and follow-up tooling management activities if any work is subcontracted. 

The standard requires that the design and verification activities he assigned to qualified personnel equipped with adequate resources. 

Acceptance criteria are the requirements which, if met, will deem the product acceptable. Every requirement should be stated in such a way that it can be verified. Characteristics should be specified in measurable terms with tolerances or min/max limits. These limits should be such that will ensure that all production versions will perform to the product specification and that such limits are well within the limits to which the design has been tested (see also Part 2 Chapter 2 under Identifying verification requirements). Where there are common standards for certain features, these may be contained in a standards manual. Where this method is used it is still necessary to reference the standards in the particular specifications to ensure that the producers are always given full instructions. Some organizations omit common standards from their specifications. This makes it difficult to specify different standards or to subcontract the manufacture of the product without handing over proprietary information. 

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. 

The standard requires design verification measures to be recorded. 

The verification plan needs to cover some or all of the following details as appropriate A definition of the product design standard which is being verified. 

Definition of the verification activities that are to be performed to qualify or validate the design and those which need to be performed on every product in production as a means of ensuring that the qualified design standard has been maintained. 

Within the clause on verification in ISO/TS 16949 there are no constraints on the standards to be applied to development models used for verifying the design. There are, however, requirements for prototypes under Design validation but they only apply when required by the customer. 

The standard requires the supplier to specify verification arrangements and the method of product release in the purchasing documents where it is proposed that purchased product is verified at the subcontractor s premises. 

The requirements pertain to your customer verifying product purchased by you either at your supplier or on your premises. Verification of purchased product is normally carried out by the supplier before or after receipt as part of the purchasing process but may also be carried out by the customer. However, due to the standard locating most of the inspection and test requirements in clause 4.10, the receipt inspection requirements are displaced. 

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