This is the most critical part. Your Janma Nakshatra dictates your Dasa periods (Vimshottari Dasa). Vakya-based Nakshatra calculators often yield a different Pada (quarter) than other systems.
allow users to switch between modern algorithms and traditional Vakya methods when viewing daily panchangam details. Specialized Software Vakyam Horoscope Explorer Tamil Vakya Panchangam Horoscope Online - Google