“There are two prime requisites in efficient staff service, coordination and infiltration. The tertn "co-ordination" describes the necessary method of sound staff procedure, but "infiltration of knowledge" is the ultimate purpose of all staff activities. Staff service is not alone for the top leader. It comes to him first, for he needs it in the making of his initial decisions, but the subordinates in the scalar chain, down to the very rank and file, likewise need it in the intelligent execution of all plans.”