# Thread: Think Time & Pacing time

1. ## Think Time & Pacing time

Hi All,

Please let me know the formula to calculate think time and pacing time for a web application

Thanks,
Ed

2. ## Re: Think Time & Pacing time

Iteration pacing is a function of the following

a = # of transactions per hour for a given business process

b = # of users of a given business transactions

c = a/b (Transactions per user per hour)

iteration pacing interval (beginning of one to the next) = 3600/c

As to think time, that is going to vary by your business process and your user population. In general, (user think time + system response time)&lt;=iteration pacing interval. Natural population behavior tends to follow a poisson function for distribution, so if you know your maximum, minimum and variance for think time on a given page you can implement a poisson function in C to feed your think time for a given instance. For more information on chaotic behavior in natural populations you may want to consider the following book, Chaos:Making a New Science by James Gleick.

3. ## Re: Think Time & Pacing time

think time

the simplest way to do it is to record the think time it takes you

so lets imagine that you are an average user!!!

then in RTS select think time = random between 50 and 150%

this should give you a normal distribution (a form of poisson distribution) for think time in your test

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