What are the key elements which can effect the planned production and what are the best tactics to defuse these elements?

The elent that can affect planned of production are  *One raw materials  *two transportation # weather condition. We most make sure all raw material are avilable at a specific time of needed. all matrials must be lefted befor the specific date of needed in order not to delay needed customers, labour must not be giving a enugh holiday bcause no one can say much about weather condition that can affected operations of machines

Inventory planning and control , maintenance scheduling, manpower 

Raw materials are key element for production planning.