This is from a post on 'The Valley of Despair' by Jim Blanchet.

The Dunning-Kruger effect effect occurs when a person's lack of knowledge and skills in a certain area cause them to overestimate their own competence. By contrast, this effect also causes those who excel in a given area to think the task is simple for everyone, and underestimate their relative abilities as well.

Six sigma as an approach/methodology is a brilliant problem solving technique. The beauty of the methodology is that it is a systematic approach where we “Define the problem (define) – measure the extent of the problem with data (measure) – analyze the data with tools/ techniques (Analyze) – suggest improvements and implement solutions (Improve) – control the improved process (Control)”.

If you are launching a new project or introducing a new process—or improving an existing one—that significantly impacts your employees, there are some questions you should ask to ensure you are not lagging behind on your project or, even worse, missing your objective altogether. By asking a few simple questions, you can quickly understand whether or not you will achieve the desired outcome.
Q. Is your project on schedule, within your budget and well received by your employees?

• If you answered 'YES', Congratulations - you are doing something right!!!
• If you answered 'NO', you may be stuck in the Valley of Despair.

Typically, at the start of a project, people are excited. It is something new and they have the opportunity to participate in building a solution to make their company better. As the workload increases, people tend to struggle with issues and decisions and start to have trouble seeing the end.

With each new project, there is a period of time where productivity decreases immediately after implementation. This loss in productivity occurs as a result of shifting your routine away from the way things are—how your employees do business before the change—to your desired outcome.

There are several things that cause a dip in productivity, but some of the most significant culprits include:

1. Inefficient implementation processes
2. Ignorance of new responsibilities that come with the project
3. Lack of stakeholder buy-in
4. Inadequate change management plan

Via quora