Measuring a good system.

[YachtFund]

Im trying to figure out if the systems I have created are any good.

Using a profit loss ratio of 2.3 as an average how would you rate a system that created on average (per month in pips):-

0-50
50-100
100-250
250-500
500-1000
1000+

Would you use the figures above or alter them?

Thanks

YF