About the leading interim service provider rankings
The IIM’s “Top 80 Leading Interim Service Providers” are listed in four tiers from Platinum, through Gold, Silver and Bronze (20 Providers in each). We also list a further 20 ‘honourable mentions’ who fell just outside the top 80.
These placings are voted for each year by over 2,000 interim managers and executives, who each cast votes for several interim service providers in the IIM’s annual Interim Management Survey.
Whilst the lion’s share of the ranking comes from this year’s vote, to reward an ongoing track record of excellence, we allocate some marks (in decreasing amounts 50% – 25% – 15% – 10%) from past years’ surveys so that rankings are not simply based on one year’s activity but upon a trend.
Consequently, our rankings are ultimately built upon over 46,000 individual votes cast over a four-year timeframe.
Once the votes are cast, there is no manual intervention. Rankings are derived by an algorithm measuring both the quality of votes (great to dismal) and the statistical significance of receiving many votes.
If you have any technical questions about the survey, please contact us directly.