The Ford & Son Test Cricket ratings
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Win toss

& win match

Lose toss & win match

Draw

Lose match

Series Run Rate

Home

9.75

10.25

0

0

total runs scored / total wickets lost

Away

11.75

12.25

2

0

1.1 x total runs / total wickets

An example... 3 match series between Sri Lanka and England that completed in Dec 2003

 

 

Sri Lanka

England

Existing score before series began

X & Y

35.46

41.19

Total score available

X + Y

76.65

Test results

 

1 home win (away team won toss)

2 away draws

Match points

 

10.25

4

Total runs and wickets

 

1846/45

1437/56

Calculate run rates

 

41.02

add 10% = 28.23

Total scores gained from series

Q & R

51.27

32.23

Adjusted series total points to equal total points available

Q2 = Q * (X+Y)/(Q+R)  and

R2 = R * (X+Y)/(Q+R)

47.07

29.58

Series points worth...

T/(T+6) = G

3 tests = 3/(3+6) = 33.33%

New total

G*Q2 + (1-G)*X and

G*R2 + (1-G)*Y

1/3*47.07 + 2/3*35.46

1/3*29.58 + 2/3*41.19

 

39.33

37.32

The Method
 how does it all get worked out?
The basis of the table is that it takes into account each team's current form, how well each team plays in a series - not just the overall score.
It takes into account whether a team is playing at home or away, who won the toss and the exact result of each match!
The table is changed in proportion to how many tests are played - thus winning a five test series is better than winning a two test contest
To gain from a series you have to win by a bigger margin (or lose by a lesser margin) than your (and your opponent's) current standing suggests you will
The details!
Two teams contest the series - they come into it with scores X & Y and they will play a number of tests (T)
They gain series points by winning matches (more points if away from home, more points if lost toss) or if they are the away team in a drawn match.
Added to these points are the series run per wicket each team gets. (The away team's runs per wicket is adjusted to reflect the away disadvantage).




The series points are added up to give scores Q & R for each team. These are adjusted so that Q2+R2 = X+Y
The number of tests is placed into a formula T/(T+6) to give the fraction (G) that the current series is worth of the team's total points: (G x Q) + (1-G)X = new table total
e.g. if 3 tests are played the series points gained are worth 1/3 of their new total and their previous table score is worth 2/3.
Check out the FAQ to see why these figures were chosen and also to see how the ratings have developed over the years.