I am a PhD student currently running a Latent Class Growth Analysis (liniear one) and I would like to check with you whether I follow the correct procedure for limiting problems of local solutions.
Next I will explain the procedure I follow: First I run the LCGA with random starts of 20 4 (without tech11 to limit computation time). I check whether the output tells me that the best loglikelihood has been replicated. If it says so, I rerun the input with a starts value of 100 20 in order to be sure that the best loglikelihood is again replicated. If so, I put my random starts at 0, add "optseed" = the seed value from the best loglikelihood found with starts 20 4, to the ANALYSE part in the input and add tech 11. So I always take the seed value from the first run (with a specific value of starts) in which I replicate the best loglikelihood. This seed value then belongs to the first loglikelihood in the first run in which is succesfully replicate loglikelihood.
I am happy to hear whether this is the optimal procedure.