This function calculates the difference in minutes between samples of two attributes. For example, suppose we have the following case fragment:

                  05 May 13           06 May 13              09 May 13
Received          201305051234       201305060909          201305091614
Dispatched        201305051244       201305060928          201305091634

Note: Received and Dispatched are both dates with the format yyyyMMddHHmm.

If we want to know the difference in minutes between Received and Dispatched, we can define a Calculated Value Attribute named “MinutesWaiting” with the following formula:

minutes difference between Dispatched and Received

Then, the evaluation for this case will be:

                   05 May 13           06 May 13             09 May 13
Received          201305051234       201305060909          201305091614
Dispatched        201305051244       201305060928          201305091634
MinutesWaiting              10                 19                    20

Note that this function requires inputs in the form “yyyyMMddHHmm”. If the dates in your sample sequence are not already in this form, then you can use the as datetime in format … from format … function to re-write them in the required form.