The Task template describes how to represent a simple task specification. A task specification is a procedural description of how to do something. A simple task specification has a simple, unstructured definition, and may also identify the context in which it is used. More complex tasks are described in the various task capabilities.
A task specification does not plan, schedule, or record what is done. This template is used to define the essential information for the specification, that is:
The template mandates only the minimum of information, and most of the information needed for a simple task is described under the characterization section.
This template is valid only for "in-use" stage of the Task specification life cycle, and does not consider the initial development phase, the obsolescence phase, development lifecycle data nor any controls on the development process or the authorizations that record that process.
The template characterization describes a task specified as applying to a specific type of product (the affected product), that is one which can be identified by a part number, as opposed to against a general product configuration, or a task written against a specific individual, for example, as a repair for specific damage. Where the affected product is fitted to a higher level end product (e.g. the task describes how to maintain a particular type of pump when fitted in a given class of ship), the characterization also describes how to identify the higher level product.
The template characterization allows for the task instructions to be held either as unstructured text or in a separate document.
The SysML Block Definition diagram in Figure 1 shows how a Task is represented in the PLCS PSM.
The following SysML Part, Reference, and Value properties are defined for this template:
OASIS:Task.id -> ExternalOwlClass.classThe task version identifier, for example, the sequence number of the version.
OASIS:Task.versionId -> ExternalOwlClass.class