Page 433 - Design of Simple and Robust Process Plants

420 Chapter 10 The Efficient Design and Continuous Improvement of High-quality Process Plants
step, the main functions involved, and its responsibility in the step. It also contains
references such as company procedures. An example of a short step-wise description
for the development of a plot plan for a new facility is shown in the Appendix 10.1.
Decision and review steps are part of the work process. The reviews are technical
as well as organizational A good work process is a feed-forward controlled concept
with feed-back loops built in (In't Veld, 1985) (Figure 10.3). This says that the work
process needs to capture up-front activities or procedures to avoid rework from the
reviews. The overall concept is: ªdo things right the first timeº.

Project approach

Feed - forward controller Feed - back controller
setpoint

Process

Fig. 10.3. An efficient controlled process has a feed-forward
controller with a feed-back adjustment.

10.3.1.1 The development of a work process
The development of a work process (WP) needs to follow a set of rules to assure the
quality of the work. The development team needs to have the following key ele-
ments:
. Scope of work
. Development methodology
. Independent moderator
. Highly qualified members of all functions involved. All functions involved
should be represented by highly qualified people; (it might be worthwhile to
introduce external company representatives during the development if they
play a role in the work process).
Some key words for people involved in the development are: open minded, with a
mandate for decision; and respect for each other.
A fully developed WP should have as end result:
. Flow diagram
. Step descriptions
. Owner assigned
. Maintenance system