This study mainly investigates the efficiency of assembly line balancing (ALB) with the consideration of the minimization of cycle time (type Ⅱ) and workload smoothing (type Ⅲ). General researchers considered that the more workload smoothing makes the more ALB efficiency. Through the simulation of variable number of workstations, the ALB efficiency of type Ⅱ is often tie or ahead than type Ⅲ. The major finding of this work shows that the ALB solution of type Ⅱ is better than type Ⅲ under a given number of workstations. When the number of workstations is satisfied enough, the research suggested solution is going to type Ⅲ because type Ⅲ not only owns ALB efficiency and cycle time have insignificant difference than type Ⅱ, but creates the better workload smoothing. Therefore, the major finding of this work shows that the ALB solution of type Ⅱ is better than type Ⅲ under a given number of workstations.