Preproduction versus postproduction adjustments. The amount of learning shown by the learning curve depends both on the initial unit(s) of output and on the learning percentage. If there is much preproduction planning, experimentation, and adjustment, the early units will be produced more rapidly than if improvements are made after the i rst few units—other things being equal. In the i rst case, therefore, the apparent learning will be less than in the second case, even though subsequent “actual” learning may be the same in each instance.

 LO.1