15288


	[Integration] [15288 mapping] [Other mappings]

The HS Model (ISO PAS 18152) and the System Engineering Life Cycle standard (ISO/IEC 15288) were designed to relate to each other.

The HS Model can be seen as fitting between business excellence on the part of the customer and effective system delivery on the part of the supplier.

The timing and resourcing of the project to develop the HS model facilitated links the development of ISO/IEC 15288:2002 System engineering - system lifecycle processes, which now provides a benign system engineering context for HSI. From a system engineer's perspective, the HS model provides an overlay to the system engineering process. The mapping between the two models is broad, complementing the mapping under the Human-Centred Design Environment (HCDE) programme by Dugger et al (1999), which focuses on the vital technical interaction at a working level between (typically) HS.3 Human Centred Design and system engineering Technical Processes.

From the point of view of the operation of a business or Command affected by the system acquisition, operability has strong links to effectiveness at a business level. Operability as defined here is much the same construct as military capability. For a commercial customer organisation, there are strong links to the concept of Business Excellence as considered by the Baldridge Award.

These links, however, should not disguise the differences in perspectives and the associated key metrics. Thus, system engineering is concerned with project outcomes such as time and cost, the business-centred or operational perspective is concerned with performance and relations to key stakeholders in a broad manner (and not at a project level), while HSI provides assurance of the effectiveness with which users achieve specified goals. So far as system engineering is concerned, the difference in perspective between the HS model and CMMi® is quite a sharp paradigm shift, while ISO/IEC 15288 has gone the extra mile to allow for the human perspective on systems.

A set of slides has been developed to illustrate this and to show the mappings between these models.

Click here to view the slides. The first slide attempts to summarise the relations between HSI, system engineering and a business-centred operational view. Simply put, HSI is vital to the business case for system acquisition and provides the link between system engineering and operational worth.

Subsequent slides detail the mapping between the HS model and 15288.