Summary or Sum()?

[LaRetta]

Hi everyone,

I using summary fields almost exclusively over Sum() calculations for a few reasons:

1. One summary field can be used if placed directly onto any related layout whereas a Sum() calculation is only good for the table it is created in.
   
2. Aggregate calculations such as Sum() are more resource intensive.
   
3. I experience less flash with summary fields over Sum().
   
4. The only time I use Sum() is if I need to manipulate the values further.
   
5. Summaries can filter if placed within filtered portal single row - Sum() can't.
   

But I would like to get opinions of the top Developers here as to when they use one or the other and why. Thank you for any input you can provide toward this personal curiosity.

Added number 5.

[Vaughan]

Both have their places:

Total_c = Sum( relationship::amount ) [calc field]

Total_s = summary total of Total_c [summary field] used for reporting