Importance of Calculation Speed 
Importance of Speed  Faster Calculations  Microsoft's Advice  Bottlenecks/Size 
Lookups  Dynamic Ranges  Totalling  Generating Workbooks 
MultiLevel Calculations  Array Formulae  SUMIF Example  Worksheet Links 
Why is Calculation Speed Important?The Effects of Slow Response Time
Response time greater than 10 seconds:
Response time greater than 1 second but less than 10 seconds:
SubSecond Response:
Instant Response:



