A food manufacturing plant produces ketchup packs , which are used in several fast food restaurants . In this plant , a production machine pours the ketchup into small plastic pouches and seals the pouches once the pouch is filled with the required volume of ketchup . The target weight of a ketchup pack is 50 g +/- 0.5 g . The machine operator is responsible to take 5 ketchup packs every 30 minutes from the machine output and weight each pack using a weigh scale located by the machine . The measurements are plotted in a control chart to monitor and control the ketchup pack weight . This process is set up in a clean and temperature controlled environment to ensure food safety .

Answer the following question using above statement..

1. Identify 5 measurement system elements used in this process.

2. List 2 possible root cause affecting the process variation due to the manufacturing process of filling and sealling the ketchup packs ​