L4 – Logical Activities

NAF v3: NOV-5 MODAF: OV-5

TaxonomyStructureConnectivityProcessesStatesSequencesInformationConstraintsRoadmap
Logical
Specifications
L1
Node Types
NAV-2
AV-2
L2
Logical Scenario
NOV-2
OV-2
L3
Node Interactions
NOV-2, NOV-3
OV-2,OV-3
L4
Logical Activities
NOV-5
OV-5
L5
Logical States
NOV-6b
OV-6b
L6
Logical Sequence
NOV-6c
OV-6c
L7
Logical Data Model
NSV-11a
OV-7
L8
Logical Constraints
NOV-6a
OV-6a
Lr
Lines of Development
NPV-2
AcV-2

The L4 Operational Activity Model describes the operations that are normally conducted in the course of achieving a mission or a business goal. It describes operational activities (or tasks), Input/Output flows between activities and to/from activities that are outside the scope of the Architecture.

Background

L4 describes the operational processes and activities that are being conducted within the mission or scenario. L4 can be used to:
• Clearly delineate lines of responsibility for activities when coupled with L2 – Logical Scenario.
• Uncover unnecessary Operational Activity redundancy.
• Make decisions about streamlining, combining, or omitting activities.
• Define or flag issues, opportunities, or operational activities and their interactions (information flows among the activities) that need to be scrutinised further.
• Provide a necessary foundation for depicting activity sequencing and timing in L8 – Logical Constraints, L5 – Logical States, and L6 – Logical Sequence.

L4 activity models describe the business processes associated with the architecture, as well as the:
• Relationships or dependencies among the business processes.
• Information exchanged between business processes.
• External interchanges (from/to business processes that are outside the scope of the model).

An operational activity is a logical process, specified independently of how it is carried out. To maintain this independence from implementation, logical nodes in L2 are used to represent the structure which carries out the operational activities. Operational activities are realised as functions (R4) which are the “how” to the Operational Activities’ “what”. That is, they are specified in terms of the resources that carry them out.

Usage

Representation

Detailed View Description

Key Elements and Their Relationships

l4-hlmm

Meta-Model

The detailed meta-model for L4 can be viewed here

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