I have seen some BPMN models that have a "multiple instance" attached to the pool (3 vertical lines on the bottom of the pool). I think this represents that multiple persons are executing all those tasks on paralell.
My question is if it is valid to do that, but on a lane. If it is possible to attach a "multiple instance" sign on a single lane on a model to represent that multiple persons execute this tasks.
(I am currently grading some tests and I came up with this question)
Reading from the BPMN2.0 standard it is allowed to add the multi instances attribute to a pool or lane.
https://www.omg.org/spec/BPMN/2.0/PDF Chapter 9.4 – PartnerRole attributes, Page 147
Participant Multiplicity
ParticipantMultiplicity is used to define the multiplicity of a Participant. For example, a manufacturer can request a quote from multiple suppliers in a Collaboration.