Dr. Dinesh,
I am sure you may be regretting your impulse to make a post here about your doubt (regarding archana and that too in temples). If you have the time and background knowledge, and study our hindu religion, you will find that "archana" forms one of the 16 'upacaaras' to be performed to one's god (i.e., one's ishTa dEvata, which means, again, an idol of the ishTa devata as per current hindu thinking). Therefore, the practice of getting any kind of archana being done by an appointed priest to an idol in a temple, which is a place for common worship of the community, will stand contrary to basic hindu religion.
The fact is that there was no such archana when the people were adhering to the teachings of the vedas only. We then had only one god entity, namely the sacrificial fire in which all other devas (devatas, deities, gods) were invited imaginarily and oblations were offered in the same fire for several devatas. As time passed, we hindus (which, in those days meant only the people belonging to the three higher castes —Brahmana, Kshatriya and Vaisya —, started building temples more and more elaborate, larger and ostentatious, to different forms of god, appointed priests and other servants for proper maintenance and running of these temples, and so on. The temple priests started performing archanas on behalf of any devotee, and in return the priest used to get dakshina directly from the devotee.
After introduction of government control, etc., this practice has undergone several procedural changes, and today, archana as per individual devotee, is not performed in most temples; what happens is that the devotee purchases an archana ticket from the temple office, buys the archanai thaTTu from one of the shops in the vicinity of the temple and these are collected by one assistant to the Chief Priest. Later another assistant priest or some other temple employee puts the prasadam in the thaTTu after taking away the flowers, coconut, garland, etc., and this is returned to the devotee. No archanai takes place but the ignorant, gullible, bhakta gets the vicarious satisfaction of his/her having performed a great and good deed! That is all.
I personally feel that if we place even a few flowers before the image of god in our house with sincerity, that will be a better deed than going through this charade of Temple archanas.