belief in the system

normally the success and efficiency of the system is calculated as the ratio of resolved cases over reported cases. 
vg.  
resolved case      5        

------------------= ---------=0.5
reported case      10

now let us find out how many cases are reported , just look at another way.

instances reported    10

----------------------=--------= 0.01
instances occurred    1000


now let us combine with the above then the efficiency comes to 
=0.01x0.5 = 0.005


thats how the equation should have to be treated.