Final answer:
To obtain 1812 non-defective units from the process with a process yield of 0.86, 2112 units need to be started.
Step-by-step explanation:
To find the number of units that need to be started through a manufacturing process, we can set up a proportion using the process yield. Let's call the number of units needed to be started 'x'. We can set up the proportion as:
Non-defective units/Total units = Process yield
Substituting the given values, we have:
1812/x = 0.86
Cross multiplying, we get:
0.86x = 1812
Dividing both sides by 0.86, we find:
x = 2111.6
Since the number of units must be an integer, we round up to the nearest whole number and conclude that 2112 units need to be started.