Trans RINA, Vol 153, Part A1, Intl J Maritime Eng, Jan-Mar 2011


and “cost, timescale and risk”. Thus not only the requirements owner has needs to be encapsulated but so do all the other stakeholders; there is a set of solutions to be explored (and only the designer can lead on that); and the process of finding out what is wanted is absolutely informed by cost, time and risk. The latter three can only be addressed, for physically realised products, through physically realisable design solutions, which then give the consequences of different design solutions. It would seem redundant to make the latter point if it wasn’t that considerable effort continues to be expended on defining requirements and solutions “in abstract”. In fact the MoD


Smart Procurement process even set up the DPA’s Future Business Group, which boasted that its role was to produce “solution independent requirements”. And it was just such a


Cranfield University’s Professor of Systems Engineering highlighted at the conclusion of the 2003 IMDC paper [4]. Rather it can be seen from Figure 2 that this first crucial bubble,


through ‘possible solutions’, can then


inform the capability statement and thus constitutes Requirement Elucidation, defined by the author as being the primary task of the Concept Phase of design.


statement that provoked the repost by


Figure 1: Basic systems engineering processes [10]


Figure 2: V Diagram due to the 2007 RAEng Guide to Systems Design [12] ©2011: The Royal Institution of Naval Architects A-25


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