I want to implement flow shop scheduling problem for a problem with 10 jobs and 5 machines.( using permutaion crossover and permutation mutation) to minimize the make span. How to go ahead.please guide.

I want to implement a permutation flow shop scheduling problem for a problem with 10 jobs and 5 machines.( using permutaion crossover and permutation mutation operators) to minimize the make span using genetic algorithm. How to go ahead.please guide. I am getting difficulty in writing the MATLAB code for the make span for different permutations of the jobs ( i.e., job sequences).