[BostonCard]

Interesting analysis (unfortunately, I can't see the graphs)

https://mgoblog.com/comment/818953

A couple comments:
Firing Andy Buh and Ron Lynn as co-defensive coordinators in 2009/10 was the second best defensive move in the table.  Stanford's defense improved 74 spots and went from 96th to 22nd.  Also, Cal had the third worst firing back in 2007.

Before you type tl;dr, here's a quick summary of findings: changing the defensive coordinator of a poorly performing defensive unit tends to lead to a modest improvement in the next year. Changing an offensive coordinator is much more of a crapshoot with no clear trends, even if we look at performance two years after the change.

Fun fact – note that replacing a staff entirely leads to about the same change as keeping the same staff.

That might be an argument for replacing Anderson but keeping Pritchard.

Note the analysis was done in 2010 for a Michigan blog.  In that year, Michigan had a defensive FEI of -.51; the next year their defensive FEI was 0.69, one of the biggest FEI improvements I've seen.  Of course, how much of that was due to new DC Greg Mattison and how much of it was due to new head coach Brady Hoke is hard to tease out.

BC

[BostonCard]

Interesting analysis (unfortunately, I can't see the graphs)

https://mgoblog.com/comment/818953

A couple comments:
Firing Andy Buh and Ron Lynn as co-defensive coordinators in 2009/10 was the second best defensive move in the table.  Stanford's defense improved 74 spots and went from 96th to 22nd.  Also, Cal had the third worst firing back in 2007.

Before you type tl;dr, here's a quick summary of findings: changing the defensive coordinator of a poorly performing defensive unit tends to lead to a modest improvement in the next year. Changing an offensive coordinator is much more of a crapshoot with no clear trends, even if we look at performance two years after the change.

Fun fact – note that replacing a staff entirely leads to about the same change as keeping the same staff.

That might be an argument for replacing Anderson but keeping Pritchard.

Note the analysis was done in 2010 for a Michigan blog.  In that year, Michigan had a defensive FEI of -.51; the next year their defensive FEI was 0.69, one of the biggest FEI improvements I've seen.  Of course, how much of that was due to new DC Greg Mattison and how much of it was due to new head coach Brady Hoke is hard to tease out.

BC