Market Shares And Forecasts – Who Cares?

A recent RFP for consulting services regarding strategic platforms for SAP from a major European company which included, among other things, a request for historical and forecast data for all the relevant platforms broken down by region and a couple of other factors, got me thinking about the whole subject of the use and abuse of market share histories and forecasts.

The merry crew of I&O elves here at Forrester do a lot of consulting for companies all over the world on major strategic technology platform decisions – management software, DR and HA, server platforms for major applications, OS and data center migrations, etc. As you can imagine, these are serious decisions for the client companies, and we always approach these projects with an awareness of the fact that real people will make real decisions and spend real money based on our recommendations.

The client companies themselves usually approach these as serious diligences, and usually have very specific items they want us to consider, almost always very much centered on things that matter to them and are germane to their decision.

The one exception is market share history and forecasts for the relevant vendors under consideration. For some reason, some companies (my probably not statistically defensible impression is that it is primarily European and Japanese companies) think that there is some magic implied by these numbers. As you can probably guess from this elaborate lead-in, I have a very different take on their utility.

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