Drawing review

Your product specification (engineering drawing) is complete and you want to contact the customer or supplier shortly, or even start the ordering process. But are you really sure that you have described the product completely and clearly and that your contractual partner has received all the relevant information? Are you aware of the consequences of incomplete product specifications, especially in the case of valuable or safety-relevant components, but also in the case of molded parts and large quantities?

Due to the extensive omission of drawing inspectors in the company, serious deficiencies arose, often unnoticed, with regard to the clarity, completeness and plausibility of the technical specifications, among other things. In plain language: the drawing quality has deteriorated dramatically.

In some cases, elementary information required for production or quality assurance is missing. More than half of all product specifications have significant and verifiable deficiencies with regard to functional, manufacturing, testing and cost-related tolerances alone and would sometimes allow the manufacture of non-functional products. Material specifications are not clear, incomplete or outdated, the product is not optimally designed technically and economically and there is sometimes the wrong idea that the CAD data set already describes the product completely.

As long as the products are manufactured in-house or by traditional suppliers, an insufficient quality of the technical specifications may only cause few problems, but when there is a change of supplier, defective specifications are almost always noticeable through unnecessary coordination, misinterpretations or even incorrectly manufactured tools or workpieces.

If insufficient technical specifications lead to a product failure only during operation, a possible product recall can result in high costs and the damage associated with the failure represents an incalculable product liability risk. If technical specifications are created on behalf of the customer, defects can ultimately lead to irreparable damage to the company's image.

An external and neutral drawing review in the sense of an independent second opinion at an early stage of the project ultimately saves you valuable time and possibly also costs. The effort required for this is usually negligible.

Checking the completeness and clarity of your product specifications (construction drawings):

• Drawing layout review - Can all important information be captured quickly?
• Check for complete dimensioning (if necessary reference to CAD data record) and reasonable tolerance
• Presence of all necessary views and sections (for 2D specifications)
• Does the general information make sense?

Standard-compliant tolerance management (ISO-GPS or ASME Y14.5):

• Conformance to the ISO GPS standard system. Have all relevant, current tolerance rules been observed?
• Compliance with ASME Y14.5-1994, -2009 or 2018 if your specifications were created on the basis of ASME Y14.5
• Are all functionally required tolerances (dimensional, geometrical and surface finish) properly specified?
• Identification and elimination of possible tolerance errors and specification ambiguities
• Completeness of specification operators
• Testing and cost-effective tolerancing as well as showing optimization possibilities
• Identification of unnecessary "fear tolerances"

Correct and clear material specification:

• Conformance to relevant national, European or international material standards
• Checking the completeness of the material specifications and, if applicable, order designations

If you are interested in checking the drawing, please contact us.