Page 18 - Impiantistica Industriale

execution strategy from stick-build to modularisa-
tion at the start of the EPC (engineering procure-
ment construction) phase.

Modularisation plan

A plan for modularisation was prepared as part of
FEED to:
• Outline the strategy to be adopted for modu-
larisation on the CP
• Define the stages and decision processes to
determine the extent, scope and methods of
Cogen 2 site as it looked after - 75 large pull pits and duct banks in con- modularisation
the delivery of PAR/PAUs and
before the arrival of HRSG fined space and up to 4 metres under- • Define outline requirements for project groups
ground in the execution of modular projects
This plan for modularisation has been developed
Project execution strategy according to the following stages:
Stage 1 - Key investigations / constraints
•
Amec Foster Wheeler was initially awarded the • Stage 2 - Module screening study
FEED phase for a stick-built project. Work started • Stage 3 - Module quantification study
in 3Q 2013 with our Milan operations as the lead • Stage 4 - Module proving study
office in work sharing with Singapore. • Stage 5 - Module definition phase
During the FEED optimisation phase, the opportu- • Stage 6 – Module execution phase
nity to pursue a modularised approach was iden-
tified and this became the alternative case to the
stick-built project base case.
The challenge for us was to convince the stake- Stage 1 – Key investigations and
holders that by adopting a full modularisation ap- constraints
proach, we would overcome the site constraints
and deliver a project at a lower cost and at an This stage should ideally be undertaken very early
earlier completion, over and above the already in the project, when only basic outline information
acknowledged expectation for a better safety and is available and encompasses a high level review of
quality performance. key factors in the areas of schedule, labour, safe-
To do that, while the FEED for the stick-built project ty, environmental and regulatory, local content, site
was executed a parallel study assessed the alter- attributes and site access.
native case with a modularisation approach and However on CP we started late and performed this
which, if proven viable, would change the project step at approximately half way through FEED, with
Feasibility Pre-FEED FEED EPC
study
OOM est Screening study Concept Concept Class 2 est Class 1 est ±5%
Class 5 est selection definition Class 4 ±10%
±40% est ±30%
Key
investigations /
constraints Module
screening study
(MSS) Module
quantification
study (MQS)

Module proving
study (MPS)
Module definition
phase
Module
execution phase

Modularisation stages in relation to project phases

16 Impiantistica Italiana - Settembre-Ottobre 2017