Although the U.S. Bureau of Labor Statistics (BLS) does not provide information specific to the field of global marketing, the BLS did project that the employment of marketing managers will likely grow by about 12% between 2012 and 2022, a rate consistent with the average predicted for all occupations.
Divide the height of the staircase in inches by the intended rise of each step, also in inches, to assist in determining the stair stringer length. The riser height is up to you, though most building codes will not allow a height larger than 7 3/4 inches.
This compensates for the tread thickness you install. The top is also squared, with the back of the stringer cut to the length of the run. With the stringers thus laid out and readied, all that remains is to install each and run treads across the steps. Stairs4U: Stringer Layout - Learn How to Design a Stair Stringer.