Page 446 - Design of Simple and Robust Process Plants

10.3 The Design of High-quality Plants 433
The construction plan must include the net work planning with, timing of deliv-
eries, construction times, the sequence of installation of equipment, and critical
pathways identified (C.I.I., 1986).
Timing/documentation: the preliminary and final construction plans are developed
at different levels of detail over time. The first concept needs to be prepared during
basic engineering, and completed during detailed engineering.

10.3.2.9 Value engineering
Traditional value engineering aims at eliminating or modifying items that do not
add value for the company (Miller, 1989; SAVE International, 1997). Process simpli-
fication focuses on the elimination or combination of process units and/or equip-
ment. Value engineering plays a role at equipment level. The same brainstorming
group discussions are organized as discussed under process simplification, but the
leading questions are focusing on a more detailed level.
Timing/documentation: as with the VIP process simplification, there are two levels
of documentation. The team itself documents the brainstorming results, while the
ideas developed and evaluated for implementation are reported by the project team.
Timing is during the basic engineering stage.

10.3.2.10 Implementation of VIPs in the work process
The VIPs may be considered as:
. a separate item;
. a specific step in the work process; and/or
. a design procedure to be incorporated in a work process step.
Different companies make different choices regarding the types of VIPs and their
implementation. The feasibility, conceptual design and basic engineering phases in
a timeline are shown graphically in Figure 10.8. The points of application of the
different VIPs are shown. It should be realized that the VIPs are also extending in
the engineering and construction phases, and in the operational/evaluation phase.
For instance, the VIP waste minimization but also maintenance and construction
extend in these phases next to the evaluation of the all VIPs (Figure 10.9).

Evaluation of FEL and VIPs The evaluation of the project is an important point for
the learning curve with regard to the work process and the quality of the design.
The primary purpose of the evaluation is to check if the required objectives have
been met.
The most important requirements are divided into process plant-related and pro-
ject-related:
Process plant-related Project-related
Capacity Capital
Unit ratios Timing
Flexibility Start-up time
Product quality