If the model is a CTMC or DTMC, it is possible to compute corresponding vectors of
steady-state or transient probabilities directly
(rather than indirectly by analysing a property which requires their computation).
From the GUI, select an option from the "Model | Compute" menu.
For transient probabilities, you will be asked to supply the
time value for which you wish to compute probabilities.
From the command-line, add the -steadystate
(or -ss
) switch:
prism poll2.sm -ss
for steady-state probabilities or the -transient
(or -tr
) switch:
prism poll2.sm -tr 100.0
for transient probabilities, again specifying a time value in the latter case. The probabilities are computed for all states of the model and displayed, either on the screen (from the command-line) or in the log (from the GUI). For both steady-state and transient probability computation, PRISM assumes that the initial probability distribution of the CTMC is an equiprobable choice over the set of initial states.