Citing the flyaway cost for the list is ok, but the "required complementary contracts & agreements for training, sims, spares and manufacturer’s support from prime contractor, plus additional contractors such as engines" is difficult to ascertain because each acquisition is different. Even the NZDF Sprite and Texan acquisition support, training, sims, spares etc., are different in the fact that, for example, we had to acquire missiles for the Sprites. Using different countries acquisitions to include the associated costs is also problematic because each country will have different requirements. For example the Indonesian regenerated and upgraded F16 package cited is without weapons, which if we went down that road we would need.
People can cite the fly way cost per unit but they will need to state a clear caveat what it is and that support, training, sims, spares etc will need to be accurately costed in addition to this.
Indeed every procurement is different that is why I wish that there is a link provided that people can make a judgement on pertaining to the veracity of the information and the context it is to be used.
There is no clear cut methodology in which will provide an accurate estimate or forecast. However, the contractual cost of all available and likely elements of the procurement is much preferred and that is how the NZDF now scope their acquisition approach. If that figure cannot be ascertained then the caveat must be included. Such as "this procurement project did not include weapons systems." As in the case of the Indonesian F-16's.
With regard to my list, that's why I had included the 100% extra for support, training, sims, spares etc., which I think evens out the variations somewhat. I did not attempt to include the whole of life cost because again each country calculates it differently. The figures quoted next to the capability are the fly/drive/sail-away costs where I can verify them. I accept the methodological flaws and attempted to eliminate as many as I can. Also remember that the list is hypothetical and only a possible guide. It does not allow for the wheeling and dealing in govt to govt negotiations that would occur in any acquisition of these sizes.
A blanket additional 100% calculation does not provide the accuracy with respect to support, training, sims, spares etc. They greatly differ depending on the platform and project scope. Each platform has to be ascertained differently and that their are cited examples for further estimations.
New Zealand will mostly be seeking capital equipment that is either COTS or MOTS. Baseline commercial values of platform hardware and supporting services & contracts will not differentiate too substantially between peer OECD or NATO countries. So people will need to make value judgements on the contract quoted and whether or not the contract included offsets or greenfield infrastructure costs and the like. There are a number of current platforms that are likely to be chosen where by we can get accurate forecasts / estimates of platform, support, training, sims, spares, weapons if required.
To reiterate: If comparisons of procurement project costs are to be made then the basic platform + support, training, sims, spares etc as a package is imperfectly the best as it is at least consistent and measurable. It is also the model that the is closest to the NZDF contractually orientated approach.