| Business DEX:— ShipLTDR | Date: 2012/05/21 19:54:08 Revision: 1.2 |
Part (Figure 2) represents a component within the ship model and is identified through a part number. A Part can be a standard part in a catalog, an occurrence of a catalog part that has been placed within the global coordinate space of the ship product model, or a part in the ship's product model not previously defined in a standard part catalog.
Parts can be identified as being:
Parts belonging to the ship's distributed systems, such as the piping system, can be connected together. End represents a point on the part to which another part can be connected. Each end is identified by a name. The location of the end to which another part can connect is represented as a point in a cartesian coordinated system, typically the Ship's global coordinate system. Connection is used to logically connect two end points together.
Document (Figure 3) represents data associated with parts, systems, or the entire Ship. Drawings, 3D models, and technical manuals are all examples of documents. Documents are associated with their id, name, and location, and can optionally be be assigned a SWBS classification.
Documents can be related to other documents. For example, in the case of a 3D model of a part, a document in a standard data format (e.g., ISO 10303-214) can be related to the equivalent document in the proprietary data format (Autocad .dwg). A document, such as a drawing, can be composed of several sheets, where sheets have their own id, name, and location. Documents (e.g., Diagrams) can be classified by a SWBS code.
Zonal Breakdown (Figure 4) identifies a division of a ship based on physical locations to divide the area of design to a manageable size, or to identify the portion of the ship that will be modularly constructed into increasingly large units and blocks. This subdivision can be called a Design Zone or Unit. Numerous Design Zones or Units are commonly identified within a ship, each one identified by a code (e.g., 2310, 2210, 3110, 2110, and 1110).
Compartment Breakdown (Figure 5) is a type of Zonal Breakdown and is a logical structure that identifies all of the physical Compartments (rooms) on a Ship. Compartments can be enclosed within other Compartments. Parts can be related to the Compartment that they belong to through their association to a Compartment item in the Compartment Breakdown.
System Breakdown (Figure 6) identifies a breakdown of the ship based on the structural systems that make up the ship (e.g., hull, decks, and bulkheads), and the engineering systems that support the ship's operation and mission (e.g., piping systems, HVAC systems, command and control systems). Each system in the breakdown is identified through the Ship Work Breakdown Structure (SWBS) code, which is defined by NAVSEA Instruction 4790.1B. Systems can be composed of sub-systems. Parts, and connections between the parts, can be classified according to the system that they belong to. Documents, such as System Diagrams, can be related to the System that they represent.
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