[tongtongcao]

According to test, the three-section division for the SVT sectors needs to be adjusted.
See the attached slide for details.
Split SVT Sectors into 3 Sections.pdf

[yugotra]

I checked the mapping against the attached run-19209 slide. The three edits add exactly the
intended overlaps: R1 sector 5 into section 1, R2 sector 11 into section 2, and R3 sector 13 into
section 3. They do not remove any existing membership, and an exhaustive check of all 42 valid
SVT region/sector combinations found no gaps or invalid duplicate section entries.

The CVT tests and all PR CI checks pass. I reran the first 10,000 events of run 19209
file with production beamSpotConst=2. Matching seeds by their exact SVT cluster signatures gives
eight PR-only and two baseline-only seeds, a net gain of six final tracks. Every PR-only seed
contains R1S5, R2S11, or R3S13, directly tying the recovery to this patch. Filtered fits increase
by five and the standard-good count by two; global residual widths and runtime are unchanged. One
old non-good track is lost, and only two of the eight PR-only tracks pass the standard-good cut, so
the recovered population has mixed quality rather than being eight uniformly good tracks.
I approve the implementation.
PR1517_REVIEW.txt

[yugotra]

I checked the mapping against the attached run-19209 slide. The three edits add exactly the
intended overlaps: R1 sector 5 into section 1, R2 sector 11 into section 2, and R3 sector 13 into
section 3. They do not remove any existing membership, and an exhaustive check of all 42 valid
SVT region/sector combinations found no gaps or invalid duplicate section entries.

The CVT tests and all PR CI checks pass. I reran the first 10,000 events of run 19209
file with production beamSpotConst=2. Matching seeds by their exact SVT cluster signatures gives
eight PR-only and two baseline-only seeds, a net gain of six final tracks. Every PR-only seed
contains R1S5, R2S11, or R3S13, directly tying the recovery to this patch. Filtered fits increase
by five and the standard-good count by two; global residual widths and runtime are unchanged. One
old non-good track is lost, and only two of the eight PR-only tracks pass the standard-good cut, so
the recovered population has mixed quality rather than being eight uniformly good tracks.
I approve the implementation.

[baltzell]

Thanks Yuri! Did you notice any significant speed differences?

[yugotra]

No speed differences, see details of the validations done for RGK and RGD runs attached as a file above:
https://github.com/user-attachments/files/33969639/PR1517_REVIEW.txt