Speed Index and Bandwidth

[raj.vorugan@gmail.com]

We ran multiple tests on same day - around same time (within 30mins) and I see varying results with wide differences in speed index.
All of them uses DSL connection, and ran from Location Dulles VA

We find that speed index varies a lot even though the contents are same. We wonder if there is a bandwidth factor here causing
difference in speed index. We also checked the bandwidth graph at the end of waterfall and I see bandwidth spiked down at approximately 3.3 secs
on the second test that reports higher speed index. This is giving us the question on bandwidth factor on speed index.

We would be looking for some insights on what causing differences for speed index. Thank a lot.