Page 275 - Practical Design Ships and Floating Structures

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purpose design

pre-testing model

control information A.B,C,D

- A

Is the reuuested inf. GottenL
/

operation of machinery, rudder degree,
anchorage, tug

Figure 4: Check for information and control for overall procedure of navigation

3.4 Election of the Selected Set and Weighting Set
We must set up the corresponding selected element for each assessment factor and the selected set
consists of the selected elements. In the paper, the selected set consists of the following seven levels:
f excellent, good, better, medium, poorer, poor, worse}
3.5 An Erample- hazard Assessment of Marine Power Plant for a Bulk Carrier

.l basis factors: U={UI, UZ, u3, u4 }:in which, UI- engine; u2- stem shaft; u3- propeller; u4- auxiliary
engine.
.2 the selected set : B={bl, bz, b3, b4, bs, bs, bl 1
In which, bl- excellent from 90 to 100; bz-good from 80 to 90; b3 - better from 70 to 80; b4 - medium
from 60 to 70; bs - poorer from 50 to 60; ba - poor from 40 to 50; b7 - worse from 30 to 40. The
number of bj (j=1,2,3,4,5,6,7) are decided by investigation joined by the experts,
.3 the weighting set: A={al, az, a3, }:In which, al - 0.4; a2 - 0.2; a3 - 0.2; - 0.2. The value aj (j=l,
2, 3, 4) decided by the experts due to lack of database. The table 1 shows the selected set of the a
single factor.
TABLE1
SELECTED SET OF THE A SINGLE FACTOR

The table 2 shows the results of comprehensive kzzy assessment