The basic law in workflow management is
I = R.T
Inventory in the system = Throughput rate x Flow Time
Inventory in the system = Throughput rate x Flow Time
An inventory can be a products in a warehouse but also a queue, a pile of documents waiting to be processed, etc. If I take the example of a individuals queuing in front of a check-in desk in the airport, the waiting time for one person (mins) (T) equals number of people in the queue (pers) (I) divided by the processing rate at the counter (mins/pers) (R).
The other major rule in dynamic systems is that an inventory is building up when the arrival rate is greater than the output rate and vice versa, inventory is decreasing when the arrival rate is smaller than the output rate.
For more details check http://web.mit.edu/sgraves/www/papers/Little's%20Law-Published.pdf
The other major rule in dynamic systems is that an inventory is building up when the arrival rate is greater than the output rate and vice versa, inventory is decreasing when the arrival rate is smaller than the output rate.
For more details check http://web.mit.edu/sgraves/www/papers/Little's%20Law-Published.pdf
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