I have solved this case from Preplounge library and I found it really interesting and clear. I have just one doubt regarding the following paragraph:
"A top performer would immediately state also that, if our concern is profit margin, the problem is probably related to price or cost section rather than in volume. The only exception could be the incidence of some fixed costs but considering that revenues are increasing, that should not be the case."
Why? I would like to clarify this part since I could have the same situation during case interviews.