Graph which plots series of successive observations of specific procedure, operation or step at regular time intervals is called

Answer: Option C

Graph which plots series of successive observations of specific procedure, operation or step at regular time intervals is called control chart. The control chart is a graph used to study how a process changes over time. Data are plotted in time order. A control chart always has a central line for the average, an upper line for the upper control limit, and a lower line for the lower control limit. These lines are determined from historical data.