26 Apr 2019 08:08 AM
I have been trying to explain to a project how response time
contribution is calculated in a Service Flow diagram. I have been referring to
this answer but came across an inconsistency in the calculation results for
more complex service flows. Can someone please tell me how response time
contributions are calculated and why my calculations seem to be off in Example
#2 attached?
Excel calculations examples-calcs.xlsx
In Example 1 –
In Example 2 –
The formulas I'm
using:
Note: The first formula I got from this answer: https://answers.dynatrace.com/questions/200720/how-is-the-response-time-contribution-in-service-f.ht...
27 Apr 2019 04:17 AM
I understand this like this
We have something like this:
Root —- A(60%) —- B (70%). —- C (20%)
This means that on A we spent 60%, from this time 70% was spent on component B (from root it will be x*0.6*0.7)
From this time 20% was spent on component C so x*0.6*0.7*0.2
Sebastian
29 Apr 2019 08:11 AM
Thanks for the reply Sebastian. So please correct me if I'm misinterpreting your answer. But from that I'm getting this formula:
(Average Time on C) = (Average Time on Root) x (Response time Contrib on A) x (Response time Contrib on B) x (Response time Contrib on C)
which becomes this formula (when trying to get the contribution time on C):
(Response time Contrib on C) = (Average Time on C)/( (Average Time on Root) x (Response time Contrib on B) x (Response time Contrib on A) )
When I try to apply this new formula to the two examples in my note however, the results still do not match the response time contributions reported on the Dynatrace Servce Flow. Are there any other factors I'm missing here?