- If the food has to be delivered by 12.00 noon at the farthest school from the Vasanthapura kitchen (which takes 4 hours to reach), what are the lower and upper specification limits for completion of the first batch of Sambar? If the cooking starts at 5.00 am, calculate the corresponding Sigma Score (assume that the standard deviation for Sambar cooking is 10 minutes, vvhile the average cooking time is as per Exhibit 7)