Explanation: Natural cause are those variation seen as a result of nature. This is seen in everyday activity and it is the same in all production lines. This cause can't be controlled or influenced. Production may be altered if this causes are controlled or tried to to he influenced.
Assigned cause are those cause that comes as a result of an external force or variable affecting production. This causes are man made or activities caused by.
In a control chat, the variation the chart is meant to address is the assignable cause which tend the alter the line of production to give a different result, from what is known under a natural cause.
True, because he was the one that created the printing press in 1440.The printing press also brought down the price of printed materials and made such materials available for the masses.
There is always one cabinet member left behind in a secure facility in case there is a catastrophic attack during the State of the Union. The member left behind is in the line of succession and therefore will lead the country and rebuild the Government after the attack.