Response times -- Dialog Steps Week / Weekend: How to compare it?

Hello,
We have SAP ECC 6.0 running on a HP-UX Cluster. Our service is a 7x7 24x24.
Like most of companies system activity is lower in the weekend, for example:
From Monday to Friday an average of 2.500.000 DIALOG Steps with a response time of 900 ms.
On Saturday we have an average of: 650.000 DIALOGS Steps with a response time of 650 ms.
On Sunday we have an average of: 250.000 DIALOG Steps with a response time of 450 ms.
So the question is: It have sense that with 10% of user activity on sunday response time is near to 50% (comparing 450ms on sunday with 900 ms in the week) why the response time on sunday is not 10% of response time in the week, something like 90 ms?
What is the correct way to analyze this numbers? Probably you never will have a linear function to represent this situation (in fact this is a Exponential function). SAP always have this behavior?
sap_responseTime(t) = exp(t) Where t is the time in ms.
F(450) = 250.000
F(650) = 650.000
F(900) = 2.500.000
Please some tips about this topic.
Best Regards,
Erick Ilarraza

Hi Erick
Response times entirely depend on the overall system hardware, usage and user activities over the system. In your case, during weekends , a lower number of dialog steps suggest fewer dialog logons in comparison to the weekdays.
In contrast, the response time ( 50%) in comparison to weekdays suggest that the users are executing some heavy transactions that show increased overall response time. These may be transactions that run reports with expensive SQL statements or fetch huge volumes of data from your database ( in comparison to the weekdays).
There cannot be a linearity maintained between the dialog steps and response times when users log in and work randomly in a system
I hope this helps
Regards
Chen

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Are SAP system still in a good performance?
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