Two subjects with one predicate

DOE-STD-1029-92

[7]

Use only AND and OR to join conditions that include both a subject and a

predicate. If two subjects apply to the same predicate (for example, "IF

temperature and pressure are stable, ...") or one subject takes two predicates (for

example, "IF level is stable or falling, ...") use the unemphasized conjunctions

"and" or "or" rather than the special emphasized logic terms.

EXAMPLE 4-8. Two subjects with one predicate.

[5]

WHEN cooling water pump and pump discharge pressure have stabilized,

THEN close CWS-V-3351-1 bypass isolation valve.

[8]

For a negative condition, use the conditional term NOT. Avoid using NOT if a

single word can be used and the condition can be stated in a positive manner. For

example, "IF the valve is open, ..." is preferable to "IF the valve is NOT closed,

..."

4.3

Nonsequential Action Steps

Procedure users should perform the action steps in the order they are written unless they

are specifically directed to perform action steps in another order. When the objectives of

the action steps will be met regardless of the sequence they are performed, then

[1]

Sequence the action steps according to usability criteria, such as according to

equipment or control board layout, to reduce opportunities for error.

[2]

Identify in a consistent fashion that a series of action steps can be performed

nonsequentially. Place a note before the sequence of action steps that can be

performed nonsequentially, as shown in Example 4-9.

EXAMPLE 4-9. Note announcing nonsequential action steps.

NOTE

The activities in Action Steps [1] through [7] may be performed in any

order.

[3]

Provide a checkoff box or signoff line for every action in a series of nonsequential

action steps to ensure that action steps are not omitted.