Test Document and advantage of writing the test document..?

Test document is the necessary document is prepared by the test engineer. when developer are completely busy on writing the code

Advantage-:accuracy exist i.e. the test engineer are never foregate the test scenarios or input, the most importantly test document are prepared by one test engineer and review by another test engineer. hence the mistake and misunderstanding can be overcome.

The test document are once prepared can be reused through the phase II as well as across the release too.

If the test engineer leave from company after the phase I the new test engineer are continuous phase II by the help of test document prepared by test engineer in phase I.