“Do not confuse simple with ease. Simplicity requires effort.”

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From a military perspective, common doctrine, training, tactics, techniques and procedures can simplify work and, hopefully, ease the execution of operations.

As defined by Microsoft:

“Simplicity, when correctly applied, results in ease of use. But simplicity and ease of use are not the same concepts. Ease of use is achieved when users can perform a task successfully on their own without difficulty or confusion within a suitable amount of time. There are many ways to achieve ease of use, and simplicity—the reduction of the unessential—is just one of them.”

Reference

Microsoft (2016) Powerful and Simple. Available from World Wide Web: https://msdn.microsoft.com/en-us/library/windows/desktop/dn742474(v=vs.85).aspx. [Accessed: 13 September, 2016].