Design Quality Control

The main objective of quality control during the operational phase of studies in ISO 9001 (ISO 9001 Section4.1) is to control the design at various stages as follows:

The input design includes all the technical information necessary for the design process. Any information that is not clear must be resolved at this stage. Instructions to control operations are often stipulated in the contract by the client. Marketing considerations are also a factor in the design process, which should carry on with some awareness of current market constraints and opportunities connected with the project. The designer must take into account the available materials in the market and the abilities of the owner. Specifications and tolerances must be identical with the design spec­ifications of the project, and the tolerances must be compatible with the specifications and requirements of the owner. The designer must take the standards of health, safety and environment into consider­ation in design for the work at the site during the design phase.

The processes of modification and renewal of drawings has been speeded up with the widespread use of (CAD) Computer-Aided Design (CAD) programs. These also enable presenting more accu­rate information, facilitating its display with tables and graphs included as part of the drawings set.

Output design must be compatible with all design requirements established as a result of internal audit. The output design must

Table 8.1 Design QC in ISO 9000

Design Input

Output Design

• Instructions and control operations

• Taking into account the marketing materials

• Specifications and toler­ances allowed

• Health and Safety and Environment

• Computer workstation(s)

• Design review

• Design review process

• Verification of the design

be compatible with the specifications of safety and health, so any changes or modifications should not be tied too closely to an older design.

Review must be set in the earlier stages of design. The design itself should always take constraints of the timetable and costs into account. Review should include verification of the design calculations for accuracy. This verification process can take previ­ous similar designs into account, as a model for the design and operation test.