Based on the residual plot below,you will conclude that there might be a violation of which of the following assumptions? 
Definitions:
Manufacturing Cycle Efficiency
The ratio of value-added time to total lead time in a manufacturing process, indicating how efficiently the production cycle is managed.
Non-value-added Activities
Tasks or processes that do not contribute to the customer's value or the final product, often considered for elimination or reduction.
Throughput Time
The total time taken for a unit to pass through a production process, from start to finish, including both processing time and waiting time.
Manufacturing Cycle Efficiency
A measure of the efficiency of the production process, calculated as the ratio of value-added time to total cycle time.
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