Anthropometrics, Ergonomics and Standard Distribution Curve

Anthropometrics
Definition - anthropometry, especially as it relates to the design of furniture and machinery.

 

Ergonomics
Definition - the study of people's efficiency in their working environment.
Standard distribution curve 

There are many cases where the data tends to be around a central value with no bias left or right, and it gets close to a "Normal Distribution" like this:

A Normal Distribution

The "Bell Curve" is a Normal Distribution. 

And the yellow histogram shows some data that 

follows it closely, but not perfectly (which is usual).

Wood design for my dad

I am going to design and manufacture a Toolbox for my dad and I'm making this because my dads old toolbox 

is slowly breaking apart soI’mm going to make him a new one the purpose will hold all his tools like screwdrivers

screws hammers and stuff like that think dad will put it in the laundry and then he won’t have to go out to the

shed and bring in a broken box  

The measurement I think I would want to use for making this box is a 14″ 

The specifications for this is going to have is 

• no loose parts
• both compartments and lid fits perfectly
• it has enough room to fit tools like hammer, nails, drills, screws etc.
• it doesn't take up to much room  
• easy to carry
• doesn't fall apart
• The handle is on tight and doesn't fall off