In Pakistan Army, ranks are followed by the procedures as it is being followed by the Britishers. Pakistan Army Ranks have been initiated by using Khaki uniform because it seems combat uniform. In British government, Officers were made by growing from lower ranks.
In Pakistan, commissioned Officers are to be promoted just after six months of training. Pakistan Army Ranks were introduced on the formation of Royal Air Force in 1918 A.D. Mostly, the uniform is same in all ranks, only the difference is of ranks those are categorized on the basis of qualification and service.
Now, in Pakistan Army, the ranks are normally placed on the chest with ranks insignia. When personnel wear Khaki uniform then ranks are placed at the shoulders.