Came across this economic theory by chance (on the Marginal Revolution Blog - Tyler Cowen and Alex Tabarrok) and it was surprisingly insightful, simple and helped to structure my line of thought on the areas of: Management, Organization setup and the importance of Areas of Excellence within an organization.
Additionally, it also explains the pay gap between excellent (A-players) and very good & below associates (B/C/D - Players).
I strongly advise you to see the video of 19 minutes that provides a great overview of this theory (so you can also understand the math).
So the O-Ring Theory of Development (Michael Kremer, 1993) is underpinned by the following assumptions:
- Production (broad sense) depends on completing a number of tasks;
- Failure or quality curtailment of any task reduces the entire product (weakest link problem);
- Quantity cannot substitute quality (2 mediocre Finance Directors will not do a better job than a great Finance Director)
If you take a broad approach to this production function you have a company or even an entire economy.
Main practical deliverables of such theory:
- Quality matching - you should put your high quality workers together (preferentially allocated to the company areas of excellence, based on its value chain) and the other workers (B/C) also together, instead of mixing them up, as the results will be significantly better;
- Higher quality it will imply better results (i.e. better outputs)
- Higher outputs/results will result in better wages (macroeconomics 101) for any organization & that the function Output/Wages is not linear

- The wage distribution is severely skewed to the right and the talent distribution follows a normal distribution (that is why small incremental talent on the top decile can have a significant impact on the associates wages);
- Workers performing in high-skill firms will have higher wages than low-skill firms (look at the wage gap of tech/pharma companies compared with other industries);
- Talent attracts Talent - High quality worker will want to work with other of the same standards (virtuous cycle)
- There is an tremendous incentive to invest in skills/quality of the workers (company and and associates)
- This theory has several "equilibria", meaning that if your are surrounded by high quality workers it pays-off to invest in becoming one, but if you are within a non-high quality organization it does not pay-off to invest, as your higher potential output will be severely curtailed by the others;
- Capital will be allocated to high quality organizations or within the organization to the areas with the highest quality potential - so if you are investing within your organization make sure you have your A-team on that area.