Regarding ABET accreditation, the minimum course requirements are for engineering bachelor’s degree programs are:
- 1/4 in math + natural science
- 3/8 in engineering science + design, including major design experience
- unspecified amount of general education (cannot be none, since Brown engineering has some humanities and social studies requirements even though Brown otherwise has open curriculum)
For computer science, ABET accreditation requires:
- 1/4 in math + natural science (including 1/8 in math including discrete math)
- 1/3 in computer science
- unspecified amount of general education
So any combination with business must fit the business and general education in under 3/8 (with engineering) or 5/12 (for CS) of the curriculum if the engineering or CS major is ABET accredited. In practice, many engineering bachelor’s degree programs require more than 3/8 of the curriculum in engineering science + design, so that would restrict the amount available for business courses even more, unless the engineering component were scaled back to the minimum. However, non-ABET-accredited CS majors (often because they leave out natural science) may have somewhat more than 5/12 of the curriculum available for business and general education. Of course, the school can also specify overloading to complete both majors in 8 semesters (or 12 quarters).