Well, this is certainly one of the rare times that I have heard that a customer can not wait for 3 minutes for a workitem. Anyway, you can set up case specific deadline monitoring (SWU3). If you use that, it will schedule a job for each work item. This way the job will execute as soon as the deadline expires and thus trigger the workflow. Please understand that this may have a negative impact on the performance of your system if you have a high number of jobs triggering constantly. Having said that, if this requirement is important to your client, then they may be willing to 'wear' the performance hit.
Dig Deeper on SAP workflow development
Related Q&A from Alon Raskin
Find out how to configure clients so that the same version of an SAP workflow item is used when the workflow is triggered in separate clients. Continue Reading
An SAP user has created a user decision step in an SAP workflow item and wants to know how an end user can send an attachment to other users. Continue Reading
A SearchSAP.com reader wants to know how to hide the forward button in an SAP Business Workplace toolbar. Continue Reading