Lord Shiva represents the aspect of the supreme being and is considered to be the destroyer of all evil and negative forces. He protects devotees from evil forces & possible dangers. He is the Divine Cosmic Dancer & the source of fertility in all living beings. So this yagya gives a miracle result to bestow prosperity, fulfillment, removal of negativities, purify the negative karma & give the protection in life. Rudravishek Yagya is done by our well trained vedic pandits with full devotion for the fulfillment of one’s desire. Rudrabhishek is an exclusive and one of 3 most popular and ultimate rituals dedicated to Lord Shiva. Rudrabhishek is done for more than 40 purposes including the following but each purpose has a sparate procedure to be followed. Doing Bigger Rudrabhishek Yagya gives more, stronger and faster results. So try doing appropriate Yagya as per your requirements. Sometimes doing Rudrabhishek may prove to be just a little for bigger and complicated problems. There are more Yagyas those support a common issues. Go through all Yagyas and try doing multiple Yagyas for same purpose and togehter if you want to put all your efforts without taking any chance. Rudrabhishek helps in following problems or purposes:

CATEGORIES 

Small: 3 Pandits x 3 Days
This Anushthan is done for future problems or desires which are at least 3 years far in future.
25000 Big Mahamrityunjaya mantras are done in this Anushthan in different ways for different purpose. 

Medium: 5 Pandits x 5 Days
This Anushthan is done for problems or desires of present but are not heavy ones or stronger Ygya is not affordable while remedy is still required. 
50000 Big Mahamrityunjaya mantras are done in this Anushthan in different ways for different purpose.

Large: 11 Pandits x 11 Days
This Anushthan is done for future problems or desires of present and also serious.  
75000 Big Mahamrityunjaya mantras are done in this Anushthan in different ways for different purpose.

Extra Large: 21 Pandits x 21 Days
This Anushthan is done for future problems or desires of pressent where immediate and strong help is required or where high profile people are involved or where the problems and desires high are or where more than one person, a family, a company, a society or a group of people is to be involved or benefitted. 
125000 Big Mahamrityunjaya mantras are done in this Anushthan in different ways for different purpose.

PURPOSES