**(31)**

An inviscid flow is the flow of an ideal fluid assumed to have no viscosity. The flow of fluids with low values of viscosity can not be applied close to the fluid boundary where the boundary layers have a significant role. If we consider the boundary layers as the Lean Six Sigma areas where the diverse functions meet, we can determine that only low turbulence is beneficial in creating an appropriate and controlled flow since speed will increase once the pressure decreases or the fluid potential energy decreases. Bernoulli's principle states also that if a small volume of fluid is flowing horizontally from a region of high pressure to a region of low pressure, then there is more pressure behind than in the front.

Contrary to what many of the Lean Six Sigma practitioners have experienced, it is easier to work in a company that has a low pressure to implement changes since it would have a faster speed of change. In a fluid that flows horizontally, the highest speed occurs where the pressure is the lowest, and the lowest speed occurs where the pressure is the highest therefore you will see that by working in an environment where the pressure to solve and provide results without analyzing and determining the appropriate root causes will produce high turbulence that will impede on the speed of change. There are two assumptions that must be met for Bernoulli's equation to apply and those are that density must remain constant along the streamline and friction by viscous forces has to be negligible. The Bernoulli's formula is:

static pressure+dynamic pressure=total pressure.

On the previous article "Dynamical system map in Lean Six Sigma environment (20)" we concluded that an evolutionary function used to create a dynamic system has a chaotic behavior and is a generator of fractals. But if we consider that the total pressure is the result of a dynamic system plus the static pressure in a fluid environment, we should ask the question about the type of fractals and dynamism that would be easy to sustain while continuously develop the systems within the Lean Six Sigma environment.