Rapid prototyping could be an advantageous methodology for developing innovative computer-based instruction. Software engineers have been successful in designing applications by using rapid prototyping. So it also could be an efficient way to do instructional design.

Yes Rapid prototyping can be an efficient way to do instructional design. Rapid prototyping is an instructional design approach which combines design, developmental and evaluation process. it is also a non-linear approach.

Explanation:

As a non linear approach, Rapid prototyping produces a sample working model that is a scaled-down representative version of the whole course. Rapid prototyping can be seen as an alternate approach to the traditional instructional design.

Instructional design is defined as the systematic approach to the development of instruction through the use of analysis, design, development, implementation and Evaluation. Designers can make use of Rapid prototyping or rapid instructional design when they face these factores; Time, budget and Environmental restraints.

Rapid prototyping is a very practical model for blended learning development, especially when only one person is involved. Rapid prototyping allows for learning as even the instructional designer is learning too.

b. take periodic breaks and alternate between tasks.  

will increase work efficiency, and avoid health issues.