Page 198 - Offshore Electrical Engineering Manual

Technical Organisation of the Design Programme 185

3. good sound insulation from outside noise, and the segregation or soundproofing
of noisy office machines such as photocopiers and printers;
4. adequate provision of telephones, computers, software, drawing boards, cata-
logues, standards, codes of practice, etc.

OFFICE PROCEDURES
This subject should be discussed in detail by the QA manual of the company con-
cerned. The manual should be based on the guidance given in the ISO 9001:2015
and information security management standard BS EN ISO/IEC 27001:2017. The
general principles are outlined in the following.

1. The project organisation should appoint a QA-experienced management repre-
sentative whose sole responsibility is to implement and maintain a satisfactory
QA system. The representative must be given the necessary authority to carry
out his or her duties, otherwise the ‘quality procedures manual’ will not be taken
seriously by the design team, especially at the beginning of the project when the
need for strict procedures is not obvious.
2. Every design document must be signed as checked and approved by those offi-
cially authorised to do so.
3. The circulation of all project documentation must be such that those whose
responsibilities are affected by a particular document receive such documents
in good time to take any necessary actions. This can be difficult to accomplish
if the document has to be commented on by a series of people within a very
limited period.
4. A quality control system is necessary in order that all items of equipment
are inspected at the manufacturer’s works and appropriate tests witnessed to
ensure that the equipment is fit for its purpose before it is delivered and
installed.

DRAWING REPRESENTATION
The following types of electrical drawing are required for most offshore design
applications.

1. Single-line diagram
This diagram is usually the prerequisite for any electrical system design. It will
be developed through most of the design period, starting as a simple sketch
and finally showing details of type and rating for circuit breakers, transform-
ers, contactors, busbars, cables, protection and control relays, metering, inter-
locking and other safety devices. Indication and control circuitry will also be
shown in an abbreviated form, although identical circuits will normally only
be shown once, with appropriate references. A schedule may also be shown so
that numerical information of a repetitive nature can be listed separately. Part
of a typical fully developed single-line diagram is shown in Fig. 3.1.1.