Meaning of ?
- First k rows of T are ?. Maps k loops to time.
- if ?I1= ?I2 then I1 and I2 execute at the same time.
- Thus, ?d > 0. This says that it takes ?d time units to move data item to where it is needed.
- Total Running Time: max(?I)-min(?I)
- Since ? has k rows, running time is O(Nk).
- Design goal: keep k small.