Hi!
There is no specific formula that will give you a Broadband Salary Structure.
Designing salary structures, whether "broadbands" or "ordinary bands," needs a lot of considerations and skills on the part of the HR professional. It cannot be discussed and learned in one or a few exchanges of posts on this site.
Broadband, in the compensation lingo, is the use of fewer job grades in the design of salary structure. Hence, from the ordinary 20 job grades, some companies would simply limit their salary structure to around 5-10 job grades. This is for the reason of simplicity and ease in the administration of salaries.
The design of salary structures and the rate ranges of each job grade or band (and the entire JG or bands) are better done with the basic compensation principles in your mind and current market data in your hand. Without them, I am sure you'll only be putting rates that have no meaning or relevance to an organization.
Indeed, it's always best to consult a professional on this matter. I just designed the salary structure for the client of my business partner in the UAE and will be designing another one this month in KSA.
We can help you too. Just call us (anytime) ---- if you have the budget!
Ed Llarena, Jr.
Managing Partner
Emilla Consulting