Page 59 - APPLIED PROCESS DESIGN FOR CHEMICAL AND PETROCHEMICAL PLANTS, Volume 1, 3rd Edition

44 Applied Process Design for Chemical and Petrochemical Plants

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2
2 4 6 8 10 12 14 16 18
Estimated Plant Cost, X 10 1, Dollars (1975), Figure 1-38. Estimating fixed engineer-
not Including Engineering Fees or Construction Overhead ing fees.

Calendar Quarters
1953 1954 1955
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I x m rr I n m rr I x m Ill'
Note: The Time Interval for Lag
or Lead is a Function of
Campany Practice in
Scheduling New Projects.

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1953 1954 1955 Figure 1-39. Process design man-
Calendar Quarters hours versus capital expenditures.
having some available who are relatively strong in becomes an expert in a single field, or if reasonable,
the needed specialties of a particular job. This does in a broad range of related topics. Each problem for
not require that projects or specific designs be lined design or study for every project of the particular
up waiting for the specialist. With over-all good gen- type passes to the specialist for detailed handling of
eral knowledge by each member of the group there design, specification, and evaluation. His work passes
is better appreciation for the exchange of views and into the project and he turns to another assignment
understanding of specific design problems. on the same or some other project.

2. The specialist approach-each process engineer
becomes a specialist in one or more related fields. In general, the specialist may often be much more of
Even in this arrangement some over-all general an expert in a particular subject under this system than
process engineers are needed to cover and tie togeth- under the generalist approach, and consequently more
er the areas handled by the specialist. Each specialist depth into the pertinent factors of a problem may come