In Four Step Theory, 1st Step is about Planet and its signification. 2nd step is about Star Lord of planet and its signification. 3rd step is about Sub Lord of planet and its result signifying capability and 4th step is about Star Lord of planet’s sub lord, which is taken as end result indicator. In short this theory advocates that a Planet gives result on the strength of itself, its star lord, sub lord and star lord of sub lord. This theory differs from Krishnamurti Paddhati (System) at one point. In KP sub lord is taken as end result indicator while in this theory Star Lord of sub lord is taken as end result indicator.
(a) A planet becomes strong significator of that house where it is placed in house, if there are no other planets in the star of that planet. That planet will remain strong planet even if there are other planets in that house.
(b) In above case, that planet becomes strong significator of its owned house/s, provided there are no other planets in that house. Otherwise, it will be weak or secondary significator of that house.
(c) If there are other planets in the stars of a planet, it becomes weak or secondary significator of both the house it resides in and of the houses it owns.
(d) A planet becomes strong significator of that house where it is placed in house, if that planet is in its own star. That planet will remain strong planet even if there are other planets in that house.
(e) In above case, that planet becomes strong significator of its owned house/s, provided there are no other planets in that house. Otherwise, it will be weak or secondary significator of that house.
A planet gives the results indicated by its star lord. So the house occupied by this star lord is strongly signified, even if there are other planets in that house. That planet will become strong significator of house owned if the houses are vacant. Otherwise, it will be weak or secondary significator of that house.
Planet’s Sub Lord has capacity to give results. This Sub Lord becomes strong significator or secondary significator of house as per the rule-1.
Star Lord of Sub acts as indicator and decider of end result of particular event.
Krishnamurthy has given importance to cusp of the house. So planet near to cusp (within orb of 030‐20') affect the strong signification of that cusp even if planet is having star in it, it will offer the cusp result strongly.
While considering conjunction or aspect, consider this with an orb of 030‐20'. Aspect of planet is considered only on cusp with 030‐20' orb and not on house.
A planet signifies other planet if it is in conjunction with it. If a planet is strong, the conjuncted planet also becomes strong otherwise it is week. If a planet is on the cusp then it becomes a strong significator of that cusp.
When Rahu / Ketu is the star lord of a planet / sub, then it gives results of conjunction / aspect / star lord / sign lord in ascending order.
Rahu or Ketu are strong as star Lords. As planet, Rahu or Ketu are strong in a house if no one is tenanting in their star. Else, they are weak. Rahu and Ketu represent Rashi Lord, star lord and Planets in Conjunction, and Planets aspecting them. If Rahu or Ketu are strong then the represented planets are also strong.
The event will materialize only when Dasha, Bhukti and Antara jointly strongly signify main and supporting houses.
If planet is totally negating the relative event's houses on step 3 – 4 then the Dasha will not fructify the matter. If planet is the Cuspal sub lord then the event will never happen.
For transit, only two steps are considered. Sub Lord or Sub’s Star Lord is not considered.
For timing the event, check the transit of the Star Lord, Bhukti Lord, Antara Lord and also Sun, Moon and Ascendant
For chart analysis, single out the planets who are in their own star. Also find out planets in whose star there is no other planet. Find out the significator of all planets through four step theory including conjunction, special signification through Rahu and Ketu and also planets which are on the cusp.
Use strong significator, Leave weak significator. Weak Significators are not used even if they are linked to the houses under consideration.
If the sub Lord of primary house is in the star that is not retrograde and signifies either primary house or supporting houses then than the answer is positive.
(4-Step Theory has been propounded by Sunil Gondhalekar)