Page 38 - Subyek Teknik Mesin - Forsthoffers Best Practice Handbook for Rotating Machinery by William E Forsthoffer

Be st Practice 1 .8 Project Best Practices
Due to competitive pressures, past union agreements and
Finalize audit results and prepare project team recommendations high in-house manufacturing costs, vendors have been forced to
for prototype class equipment use numerous sub-suppliers for major component and auxiliary
Interview quoting vendors and determine requirement for design
system manufacture and in some cases, design. This approach
and/or manufacturing audits during pre-bid phase for major
exposes the end user to potential delivery delays due to sub-
equipment with multiple component inexperience
supplier manufacturing, quality and schedule issues. These im-
portant facts are presented in Figures 1.8.5 and 1.8.6.
Fig 1.8.1 Design and/or manufacturing audit requirements in the
pre-bid phase
Vendors frequently use sub-suppliers for:
Reduced component costs
The concept of pre-bidding is very powerful and rewarding to Reduced vendor machine shop investment
all three parties in the bid process – vendors, contractors and Greater schedule flexibility
end users. Pre-bidding requires that all technical details are Reduced in-house shop load
discussed, and that appropriate changes for optimum safety and
reliability are made before a price is quoted. The advantages of
this approach are presented in Figure 1.8.2. Fig 1.8.5 Who really manufactures it?

Component scrap due to inexperience
Eliminates competitive pressures on the vendor by:
Allowing technical review before price Component scrap due to improper machine tools
Assuring the same scope for each supplier Component scrap due to improper handling
Assuring offering of the highest safety and reliability Poor or non-existent inspection
Being performed regardless of risk classification Delay in shipment

Fig 1.8.6 Potential sub-supplier issues
Fig 1.8.2 Technical discussions before $$$$$
Based on the potential sub-supplier problems noted above,
The pre-bid meeting is frequently called a bid clarification when should they be audited? The suggested action is noted in
meeting. This title can be misleading and may not have the same Figure 1.8.7.
advantages as a pre-bid meeting. The significant differences are
noted in Figure 1.8.3.
Audit sub-suppliers when:
Experience for similar components is low
Equipment risk class is high
Pre-bid meetings – are conducted before a price is quoted and End user ‘lessons learned’ warrant
allow for modifications to a technical offering
Bid clarification meetings – are conducted after a price is quoted
and may not allow for modification to a technical offering Fig 1.8.7 Audit sub-suppliers

The recommendation therefore is to always have vendors
Fig 1.8.3 Bid clarification vs. pre-bid meeting differences
define their major sub-suppliers and their experience during the
pre-bid phase. Please refer to Figure 1.8.8.
It is most important to confirm the requirements and details
of the pre-bid meeting with the contractor at the beginning of
the project. Figure 1.8.4 presents the benefits of conducting Casing
a true pre-bid meeting, and not a bid clarification meeting. Impellers and/or blades
Diaphragms
Shaft
Baseplate
The highest equipment reliability Auxiliary systems
The lowest life cycle cost Control panels
Equal scope of supply for each vendor
Shortest bid evaluation cycle time
Fig 1.8.8 Always require definition of sub-vendor and experience for
the above
Fig 1.8.4 The pre-bid meeting ensures
At this point, all details concerning vendor experience, scope,
exceptions and sub-supplier experience have been identified. If
A pre-bid procedure fact summary and a typical agenda for the objectives of the pre-bid phase and any required audits have
a compressor train are contained at the end of this chapter. It is been met, the bid evaluation phase will be short and easy, since
recommended that this information be used to justify these there will be a true ‘apples to apples’ comparison, and the lowest
meetings with the project management team as early as possible price vendor can be selected without any additional meetings or
in the project, preferably in the pre-FEED phase. discussions.

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