ANSWER

KISS is an acronym and stands for “Keep It Simple, Stupid.”  Some like to keep it cleaner and they say it stands for “Keep It Short and Simple.”

In the software development field, KISS implies that a system will function best when an analyst, developer, or architect takes a simple approach to designing. It suggests that analysts and architects should avoid complex designs. 

For business analysts the KISS is a design principle which encourages keeping system designs, requirements, or user interfaces as simple as possible. 

Complexity in design is generally undesirable because it increases the difficulty of understanding, implementing, and maintaining a system, leading to higher costs, decreased reliability, poorer performance, and a less satisfactory user experience. Complex designs can also introduce unnecessary failure points.

Related Principles

• Don't repeat yourself (DRY)
• Minimalism
• Rule of least power
• There's more than one way to do it
• Worse is better (Less is more)
• You aren't gonna need it (YAGNI)
• BLUF (communication)
• Occam's razor