Design Control

DTH Engineering & Consultants will, during the course of the design, engage various specialists with the necessary resources to fulfil the requirements of the design output, standards, specifications and statutory constraints. Organisational and technical interfaces between the various departments / disciplines are of paramount importance. Details will be in the description of the project structure.

The design input is typically developed from the basic design through to detailed design and the interaction of various disciplines. The design output is to conform to appropriate regulatory and contract requirements. It will identify the safe and correct functioning of all products. The minimum design output requirements have been detailed in the contract documents, with the actual (as calculated) design outputs being documented during the course of design work.

Design verification is to be carried out during the course of design / engineering either by checks and reviews, or testing if appropriate. When each design package is completed, it is reviewed by the appropriate Manager or relevant specialised engineering consultant. The design review includes evaluation of the basic design concepts, checking of the various calculations and assessment of other inputs / assumptions / etc. Any design deficiencies identified during the review are referred back to the originator. A design functional review is carried out. This review is to ensure the designed items can be practically constructed to meet the contract and statutory requirements. The responsible Manager will also ensure the design drawings are checked and reviewed. All design non-conformances will be referred to the appropriate Manager and / or specialist for evaluation and preparation of corrective action.

Design changes will be subjected to the same level of review and verification as for the original design. In addition, any design changes to drawings and specifications will be assigned with a unique revision number that reflects the latest revision status. Validation of design is confirmation of compliance with design output requirements. This may be confirmed as fitness for purpose, by commissioning performance tests, or other contractually agreed mechanism for validation.