So instead of artists we might expect, like Ad Reinhardt or Bob Law, are the colourful woven silks of Anni Albers, Hannah Starkey's photos of women alone in corporate offices, pictures of performances from around the world, and much besides.
In an interview for Vogue in January 2013, Jason Gay described Beyoncé's attention to detail as "obsessive" when observing her studio, noting the vision boards she created for inspiration, which contained potential song titles, old album covers and pictures of performances.
Another issue is that the episodic nature of some impairments does not lend well to these types of methods unless repeated trials can cover the length of time or period needed to obtain a complete picture of performance.
While Edison's statistics provide a reliable picture of performance of those schools, it is difficult to compare those results to national achievement standards because the scores are drawn from many different tests in schools in dozens of states.
"They were very clear with us that they would change the metric, dropping adequate yearly progress and basing a new system on another picture of performance based on judging schools in a more nuanced way," said Bruce Hunter, director of public policy for the American Association of School Administrators, who attended one of the meetings.
These ratings in turn affect what interest rate the company pays on its debt, and also how much capital markets and banks are willing to lend to it.Vivendi and other big groups are enthusiastic users of ebitda because it gives a flattering picture of performance.
It strips away financial variables like taxes to give a clearer picture of performance.
Education unions said the system had been divisive and gave a misleading picture of performance for parents.
The education minister has defended this year's school banding results, which critics say give a confusing picture of performance.
"Last year was such an anomaly [meaning it was so horrendous], that we threw it out to get a clearer picture of performance," says Drew White, Sageworks' chief financial officer.
