Will engineering and manufacturing processes follow some sort of sine curve or “stock market” curve ?

workplace psychopath: Will engineering and manufacturing processes follow some sort of sine curve or “stock market” curve ?
So won’t quality follow some sort of sine curve or “stock market” curve.

Aren’t Murphy’s laws a straightforward statement of this fact.
initial effort -90 degrees(that is 270 degrees) to 90 degrees
(quality goes from a low water mark to as good as it gets)

overhasty generalisation, or some other reason, causes quality to start falling off
(90 degrees to 270 degrees)

at 180 degrees,quality is now back at zero

efforts, that would work if quality was improving, are applied, but they cause quality to further fall off
falloff continues till 270 degrees

Answers and Views:

Answer by Moses
These processes are mostly modelled using quasi-linear functions like this one

x^2 – 1/(ax^n)

where a and n are multi-dimensional arrays or matrices. how a and n work are that ‘a’ represents some decaying matrice that is inversely proportional to the effort of the process whereas ‘n’ is a dimensional matrix connected to the revival process once the oscillation of the function reaches a very low level.
so yes you might just be right….