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The fifth shift s work will complete 12% = 120 man-hours.
The sixth shift s work will complete 12% = 120 man-hours.
The seventh shift s work will complete 14% = 140 man-hours.
The eighth shift s work will complete 7% = 70 man-hours.
The ninth shift s work will complete 7% = 70 man-hours.
The tenth shift s work will complete 5% = 50 man-hours.
Total man-hours = 1000.
Total shifts = 10
The manpower input is variable in accordance with the graph work
rate loading.
The workers can therefore be assigned against the shift man-hour
totals necessary to complete each shift s total workload.
88 Guide to Ship Repair Estimates (in Man-hours)
ch001.qxd 28/7/00 11:36 am Page 89
The following histogram indicates the calculated shift totals shown
above and the planners and repair co-ordinators can assign the daily
trade manpowers accordingly.
Marine fitters: Man-hours/Time, shifts
180
160
140
120
100
80
60
40
20
4 7
1 2 3 5 6 8 9 10
Man-hours
Shifts
Sample graph loadings for major trades in
ship repairing
(It should be noted that these sample graphs are actual loadings that
were used by a certain major ship repair yard from figures compiled
from production feed back over a number of years. These graphs
were then used by the commercial division planners to predict the
required manpower resources for up to three months ahead.)
Planning charts 89
Man-hours
ch001.qxd 28/7/00 11:36 am Page 90
Hull blasting painting man-hours
100 Ï%
Ï%
90
Ï%
80
Ï%
70
60
Ï%
50
Ï%
40
30 Ï%
Ï%
20
Ï%
10
Ï%
Ï%
30 60 80
0 10 20 40 50 70 90 100
% Time
Marine fitter man-hours
100 Ï%
Ï%
90
Ï%
Ï%
80
70
Ï%
60
Ï%
50
Ï%
40
Ï%
30
20
Ï%
10
Ï%
Ï%
30 60 80
0 10 20 40 50 70 90 100
% Time
90 Guide to Ship Repair Estimates (in Man-hours)
% Work
% Work
ch001.qxd 28/7/00 11:36 am Page 91
Marine pipefitter man-hours
100 Ï%
Ï%
Ï%
90
Ï%
80
70
Ï%
60
50
Ï%
40
30
Ï%
20
Ï%
10 Ï%
Ï%
Ï%
30 60 80
0 10 20 40 50 70 90 100
% Time
Marine steelworker
100 Ï%
Ï%
90
Ï%
80
Ï%
70
Ï%
60
50 Ï%
40
Ï%
30
Ï%
20
Ï%
10
Ï%
Ï%
30 60 80
0 10 20 40 50 70 90 100
% Time
Planning charts 91
% Work
% Work
ch001.qxd 28/7/00 11:36 am Page 92
Marine welder/burner
100 Ï%
Ï%
90
Ï%
80
70
Ï%
60
Ï%
50
Ï%
40
30 Ï%
Ï%
20
Ï%
10
Ï%
Ï%
30 60 80
0 10 20 40 50 70 90 100
% Time
Marine electrician man-hours
100 Ï%
Ï%
90
80 Ï%
70
Ï%
60
Ï%
50
Ï%
40
Ï%
30
Ï%
20
Ï%
10
Ï%
Ï%
30 60 80
0 10 20 40 50 70 90 100
% Time
92 Guide to Ship Repair Estimates (in Man-hours)
% Work
% Work
ch002.qxd 31/7/00 1:51 pm Page 93
Index
Air compressors, 60, 61 Cylinder head, 43, 48
Air receivers, 61 Cylinder liners, 44, 49
Anchors and cables, 26
Auxiliary boiler, 67
Auxiliary steam turbines, 58 Diesel engines, 42, 47
Dock rent per day, 6
Dock services, 7
Ballast water tank cleaning, 84 Docking and undocking, 6
Bearing survey, 45, 50 Docking blocks, shifting, 5
Berth preparation, 5 Docking plugs, 22
Bilge area hand cleaning, 84 Drydocking works, 5 28
Bilge water or slops handling, Duplex pump, 64
83
Boilers, 67
Electric cable conduit, 82
Electric cable tray, 80
Cables, anchors, 26 Electric cable, armoured, multi-
Cargo pump turbine, 58 core, 77, 78
Cargo pumps, 60 Electric cable, single core, 79
Chain lockers, 27 Electric cable, un-armoured,
Compressors, air, 60, 61 multi-core, 75, 76
Condenser, 54 Electric cables, 75 79
Crankcase doors, 45, 46, 51 Electric generators, 73
Crankshaft deflections, 45, 46, Electric motors, 71
51 Electric motors, crane, 72, 73
Index 93
ch002.qxd 31/7/00 1:51 pm Page 94
Electric motors, winch, 72, 73 Hull preparation by grit sweep,
Electric motors, windlass, 72, 8
73 Hull preparation by hand
Electrical insulation resistance scraping, 8
tests, 69 Hull preparation by high
Electrical switchboard, 70 pressure jetwash, 8
Electrical works, 69 82 Hull preparation by hose down
with fresh water, 8
Hull preparation by spot blast, 8
Feed pump turbine, 59 Hull preparation by vacuum dry
Feed pumps, 59 blast, 8
Flexible coupling, 57 Hull preparation by water blast,
Four stroke auxiliary diesel 8
engines, 47 Hull preparation special notes, 9
Four stroke main propulsion Hull preparation, 8
diesel engines, 47 Hull steel repairs, 29
Fresh water tank cleaning, 84
Fuel oil tank cleaning, 84
Internal steel hand scraping, 84
Gear pump, 65
General works, 83 84 Main condenser, 54
Gudgeon pin, 48 Main steam turbines, 57
Mechanical works, 41 67
Megger tests, electrical
Heat exchanger, 55 insulation resistance, 69
Hollow fenders in half pipe, 25
Hull painting area formula, 12
Hull painting of names, Oil tanker cargo pump, 60
homeport, load lines, draft
marks, 10
Hull painting special notes, 11 Pipe clamps, 38
Hull painting, 10 Pipe spool pieces, 39
Hull preparation by degreasing, Pipe work renewals in copper,
8 37
Hull preparation by disc Pipe work renewals in schedule
preparation, 8 40 steel, 35 36
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