hi anu
standing order is mandatory and it goes by the act. Model standing order book is available at the law book publishers. you can purchase the same and modify according to your company.
sop is a set of procedures, which the company should follow in all its activities. Just like quality manual, prepared by the quality department defining all the set of procedures, flowcharts, and the formats, you can also prepare set of procedures, policies, HR manuals, HR formats, flow charts etc. and name them. list out your company policy first, and start to design procedures and so on.
regards
R Devarajan