Use of a listing format for three or more conditions

DOE-STD-1029-92

can be used to add emphasis in conditional statements, for instance, by starting

each new conditional term on a new line.

[3]

If two conditions are required and both of these conditions must be met, then place

the conditional term AND between the conditions. Begin a new line when

presenting the second condition and begin a new line with THEN and the action.

[4]

If two conditions are involved and one or both of these conditions must be met

before the action is taken, place the conditional term OR in underlined capital

letters between the conditions. Begin a new line when presenting the second

condition and begin a new line with THEN and the action.

[5]

If three or more conditions are described, consider using a decision table or a

listing format.

EXAMPLE 4-6. Use of a listing format for three or more conditions.

[6]

IF all of the following conditions exist,

A. Condition 1

B. Condition 2

C. Condition 3

THEN open CWS-HMOV-290, ECW pump discharge valve.

[6]

Avoid using AND and OR in the same conditional statement as the resulting logic

can be ambiguous and difficult to understand.

EXAMPLE 4-7. Avoid using AND and OR in the same statement.

Do not use:

[8]

condition A OR condition B AND condition C,

THEN open valve D.

Use:

[8]

condition A OR condition B,

AND condition C,

THEN open valve D.