This chart immediately shows us we have a problem. Look at operator D. We must produce a unit every 30 seconds but this operator is taking 34 seconds to do the required work for that operation. We are not going to successfully produce the 900 units that the customer requires. Meanwhile, the remaining five operators have some extra time on their hands. Typically, they will over-produce, provided they have the material and the equipment to do the job.
Now we find that we only require five workers, four of them are working at or very close to takt time. We now have another problem. Operator E has a lot of time on her hands. She will use this time for mischief. It does not need to be (and in most cases will not be) malicious mischief. It will likely be with good intentions. She may, for example stack the widgets, higher and higher, until the pile falls over and some widgets break and must be scrapped. I have seen incidents of this type more than once.