أنشئ حسابًا أو سجّل الدخول للانضمام إلى مجتمعك المهني.
Yes it is. Firstly, though the manager must do some research to understand the fundamental differences between this new field and his/her prior fields. Equipped with an understanding and basic knowledge this person can keep building on his/her learning with experience every day. Beyond a certain stage, your overall understanding and perspectives on general management help you manage diverse fields. It gives you a sharper and quicker uptake on problem solving too...
No it is not compulsory. Though a successful manager in one certain field may have a bright chances of succeeding in other fields also due to his / her previous experiences. In case if the field is related to a specific technology which the manager is unaware then he/she has to rely on inputs from other sources.