Capability (C064):— representing_work_done Date: 2007/06/22 12:22:11
Revision: 1.29
CoverContentsIntro.Overview Info. modelTemplatesCapabilities.Ref. dataEXPRESS defsEXPRESSIssues

Capability EXPRESS information model

This section describes the EXPRESS information model for the capability.

From module : activity_as_realized - using all

Activity_actual

An Activity_actual is a record of an actual occurrence of a typical activity (Activity_method) that has taken place.

The typical activity (Activity_method) of which this activity is a planned occurrence is referred to by the chosen_method attribute inherited from Activity.

If the Activity_actual is the occurrence of a planned Activity then the Activity_actual is related through an Activity_happening to the Activity for which it is an occurrence.

The existence of an Activity_actual instance means that the Activity_actual has started.

NOTE 1   A Calendar_date or Date_time should be assigned to the Activity_actual classified as "start date" to record when the activity started.

NOTE 2   A Calendar_date or Date_time may be assigned to the activity and classified as "end date" to record when the activity finished. In general, the absence of this assignment cannot be used to infer that the activity is continuing, only that the end of the activity has not yet been recorded.

NOTE 3   A more detailed history of the progress of an activity may be recorded by applying states to the activity, but the meaning of these states must be defined through local business rules.


ENTITY Activity_actual
  SUBTYPE OF (Activity);
END_ENTITY;

Activity_happening

An Activity_happening is a type of Activity_relationship. It is a relationship between the definition of an activity (predicted) and its actual occurrence (actual).

NOTE 1   The ordinary value for name may be "actual", though this is redundant.

NOTE 2   Many Activity_actuals may be the actual for a single Activity.

EXAMPLE 1   a single defined activity is recorded historically by several sub-activities.

NOTE 3   A single Activity_actual may fulfil several activities.

EXAMPLE 2   a single servicing activity takes the opportunity to make additional checks and repairs.


ENTITY Activity_happening
  SUBTYPE OF (Activity_relationship);
  SELF\Activity_relationship.relating_activity RENAMED actual : Activity_actual;
  SELF\Activity_relationship.related_activity RENAMED predicted : Activity;
WHERE
  WR1: NOT ('ACTIVITY_AS_REALIZED.ACTIVITY_ACTUAL' IN TYPEOF(predicted));
END_ENTITY;

actual: the Activity which is the record of the historical occurrence.

predicted: the Activity as defined in advance of its historical occurrence.