In destructive testing, tests are carried out to the specimen's failure, in order to understand a specimen's structural performance or material behaviour under different loads. These tests are generally much easier to carry out, yield more information, and are easier to interpret than nondestructive testing.

Destructive testing is most suitable, and economic, for objects which will be mass produced, as the cost of destroying a small number of specimens is negligible. It is usually not economical to do destructive testing where only one or very few items are to be produced (for example, in the case of a building).
Some types of destructive testing:
• Stress tests
• Crash tests
• Hardness tests
• Metallographic tests

saitan, devil, rakshasaas , ---these are the tools in the In destructive testing,in the big lab of universe, to help to see the viability of products to with stand various adverse environs, and test results are used to redesign to improve the products 

all is well set, with enough thought and intentions, not by mistake, but by need , we need to expand our vision to an all accepting, all inclusive divine vision to see the role of every bit in the totality

   rakshasas/terrorists/are like destructive labs….created for a purpose

factory owner sets up a nice design and manufacturing system

to produce the best quality products

as a necessity, he also sets up the best quality control lab , for severe testing of products….tests may non-destructive tests also destructive tests like drop tests, shock vibration tests etc

when in the lab, a few pieces get broken/destroyed in the tests, inspector is not doing adharma, he is following his assigned duty, doing dharma….mercilessly, without compromise.

rakshasas/terrorists/are like destructive labs….created for a purpose

the quality /excellence of rama stands proven when he wins over the toughest fellow  ravana

hence god created a ravana  and at the end it only helped rama to prove himself

every system needs to be perfect, if not it is exposed

ATM should be tamper proof, the criminal if tampers, he is helping to convey a message that it needs to be improved

If terrorism, crimes prevail it is an indication for society and government to awake from sleep and work for perfecting the system such that it disallows the birth of an enemy

So god has been sending alert signals by creating kasabs etc

This will continue till the humanity raises themselves to the highest ideal of universal brotherhood, peace, prosperity, well being ………...without the need of maintaining army and weapons

And as our duty , Lets add an iota of goodness from each one of us 

virus is raakshas

civilization has seen every good invention with best intention has been misused, abused, for evil by devil, saitan , ever active in destructive tendencies, with equally inventive genius 
to find ways, and byways for his evil purposes, using the very same tools and technics

virus is raakshas, not new, has been there, will be there, every where, every time , along with devas 

every tapasya by every seeker is infested with rakshas trying to deflect , detract , destroy, 
yet the sincere saadhak undaunted, persists, succeeds, reaches the goal, like vikram , with skill, patience, perseverance