Page 58 - APPLIED PROCESS DESIGN FOR CHEMICAL AND PETROCHEMICAL PLANTS, Volume 1, 3rd Edition

Process Planning, Scheduling and Flowsheet Design 43

$10,000.000 The schedule of projects must often be adjusted to
I I I I I I
Engln � lng, l I reflect the influence of the key decision maker assigned to
1 Proc:ess I I the work. If he requires complete detailed figures before
Da1a of James P. O'Donnel, I
� Chem. Eng. 60, No. 1, p. 188-90 (1953) I - reaching any decision, time will necessarily be consumed.
,
I I I I I I On the other hand if he applies judgment and experience
Project Engineering (rel. abovq) I
!, /. (not Including Process Engineering) to the basic factors (less details), then the over-all direc-
�
l, \ tion of the project can be continually pointed in a prof-
I itable direction in the minimum of time. In reality actual
I I "multipliers" are often applied to the time schedule of a
' \ I . project to reflect the type of decision-maker involved.
" � \ Based on Process Engineering Assigrunent of Personnel
Ch11god at $7.00 per Man-Hour
II
Chemical Plant Engineering Operalions
1..,,,-'
J . ���t1 (Updated 1975 to $14.00/Hr.) I
·�
.
$1.000.000 I \ It is important to plan ahead for the proper assignment
I \ \ of qualified engineers to various projects as they arise.
I J \ . Jobs cannot be assigned on an unconsidered basis; that is,
J \ \
� I each lead or principal process engineer and others in his
0
o J I ' ' group on a project must be selected for their (1) basic
\
'
v I I A. \ \ \ ability to understand the process under consideration, (2)
background know-how, (3) design ability for the equip-
I I A \ ment involved, and ( 4) compatibility with the project
I ,lV J \ ' 1\ . engineer and other key decision making representatives
'\ , J 'J A \. . with whom they will be in daily contact.
(/� I/ I ' ' ... There are two approaches to developing qualified per-
'\
�
'" sonnel:
S1CO.OOO 1. The generalist approach-each process engineer
6 8 10 12 14 16 18 20
Percent of Erected Plant Cost becomes competent over-all with preferential areas
of specialization. With this approach, all personnel
Figure 1-36. Process engineering costs (1975), based on process are urged to study and keep up to date in order to
engineering charged at $14 per manhour. Chemical plant engineer-
ing operations, includes flowsheet development and drafting, mater- handle any type of project. This simplifies the assign-
ial and heat balances, equipment designs, ratings, checking, and bid ment of the men, since there are more chances of
reviews and selection of equipment. By permission, E. E. Ludwig [7].
:00,000
. ,_ Cl Large Prajects or Major Additions to
" ..J ...... 4 Eaiatlng Focilities
'I
,......_ I 7 I ..._ l!f 0 Small Proj1ct1, Small Additions to
"'ll I ......... E5 Eai1tin9 Facilitiu
'<. ¥1:1, <,
I ' Not11: Points (1),(2),(3) and Similar
� I:) � I -If Repre11nt Large Project,
J
:::, 1 r- ·� Which are "Ouplicatu" or
� 10,000 Nearly so,of known Facilities.
0
:: _, - Points (4),(5) and Similar
.,.
..
..
c:
·;: .,.2 ..... .,. "-, Large I ,� Represent Large Projects
Where All Research or other
(J -;
c:
.......
·;;. I\ """' .......... (:) """' I I ':" J Decisions not Available as
c:
w "' ·�> \- � Needed for Normal Job
Progress.
"' \ \ I\ \ i\ 1\- �
;§ 1,000
� �20
- � '" ,_,_ Small , ' TEMH
v
(:)
'
,. \ -i-..::.... \ \ \ "Q \ I\ ' ' ' \ \ ' 320 b
'
' \
\
\ \ \ \ I\
Figure 1·37. Process engi- -18- .. \.. !r \..... .\ I\ e\ \ \" TEMH
neering manhours for new '� - ....... ... ....:i
100
construction or major addi- TEMH ,
tions to existing facilities and 100 O 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 46 50 60
small projects. By permis-
sion, E. E. Ludwig [7]. Percent Proceas Engineering Man hours