Which of the following options (see multiple choices) appears to be most practical in trying to significantly improve the first pass yield of a consumer facing service process with the following workvstep first pass yields (human workers and customers involved)? (Recall that 'First pass yield' at a particular work step is the proportion of units processed correctly out of the total # of units that flow through that step)

Yield stn#1 = 0.97

Yield stn#2 = 0.97

Yield stn#3 = 0.98

Yield stn#4 = 0.97

Remove step # 3 and thus reduce the # of steps in the process

Remove step # 4 and thus reduce the # of steps in the process

Improve first pass yields of stations # 1 and 2 to 1.00, each