6 Part 6: V-Modell Reference Activities
6.3 Activities
6.3.12 Logistic Conception
6.3.12.1 Preparing Logistic Support Specification
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Purpose
On the basis of the »Overall System Specification the requirements concerning the logistic support to be realized and the »Logistic Elements shall be defined via the »Logistic Support Specification. The specification for logistic support at the highest level will be prepared in close coordination with the acquirer.
The logistic support specification shall be prepared in the form of a document or a data package within the framework of a Logistic Support Analysis (LSA, see »MIL-STD 1388-1A and »MIL-STD 1388-2B).
6.3.12.1.1 Analyzing Initial Situation and Logistic Requirements
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Logistic Support Specification: Initial Situation, Logistic Support Specification: Logistic Requirements |
When the initial situation will be analyzed, the actual situation at the location of the acquirer will be recorded and analyzed. These considerations will become important if a system of this kind already exists and is to be replaced by a new one or if the system to be developed is to be integrated into existing organizational procedures or technology.
The operational environment in which the system shall be used and its physical load shall be described to the point that all circumstances concerning its use, maintenance and repair will be known. The use or modification of existing logistic resources shall be examined.
Nature and extent of the required maintenance and repair actions shall be determined. These may be compiled and presented as follows:
- On the basis of a »Fault/Reliability Analysis, the fault possibilities of the system shall be analyzed and described. The presentation of the results should be based on the selected system architecture.
- On the basis of the identified fault possibilities the preventive and corrective actions required for defect removal shall be presented.
- On the basis of the »Fault/Reliability Analysis the frequency of the identified corrective and preventive actions that is to be expected shall be determined and presented.
Also the requirements from the »Overall System Specification shall be analyzed and further specified. Requirements to be met with regard to availability, supportability, reliability, maintainability etc. shall be defined and put into more concrete terms as far as this is possible and can be derived from the »Overall System Specification. Additional requirements will result from the analysis of relevant norms, regulations and standards.
The specification shall include quantitative estimates that make it possible to determine the correct order of magnitude when making fundamental logistic decisions. If required, logistic calculations and analyses shall be made.
6.3.12.1.2 Refining and Allocating Logistic Requirements
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The logistic support specification will be developed in an iterative approach in which it will be refined. The requirements shall be assigned step by step to the logistic elements and other logistic resources (for example special tooling and measuring and test equipment).
6.3.12.1.3 Preparing Requirements Tracing Survey
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Logistic Support Specification: Requirements Tracing |
In the »Requirements Tracing process it shall be ensured that the requirements will be completely and correctly mapped on the logistic elements and other logistic resources.
It shall be checked whether all requirements were allocated. For this purpose relations shall be established between the logistic elements or other logistic resources and the requirements.