Conventional Black box testing techniques

CONVENTIONAL TECHNIQUE OF BLACK BOX TESTING ARE
1)EQUIVALENCE PARTITIONING.(NO INFORMATION REQUIRED FROM DEVELOPER)
2)BOUNDARY VALUE ANALYZE.(NO INFORMATION REQUIRED FROM DEVELOPER)
3)ERROR GUESSING.(NO INFORMATION REQUIRED FROM DEVELOPER)
I AM PUTTING ONE MORE TECHNIQUE.
"FLAG BASED TESTING ANALYZE"(FBTA)
WHEN I WAS A DEVELOPER I FOUND THAT MANY ERRORS HAPPENED DURING USAGE OF "FLAGS" IN CODING.
THIS INSPIRED ME TO CREATE ONE MORE TESTING TECHNIQUE BASED ON USAGE OF "FLAGS".
LET FBTA BE BASED ON CORDINATION BETWEEN DEVELOPER AND TESTER.
LET FBTA BE BASED ON INFORMATION FROM DEVELOPER RELATING TO THE TEST SCENARIO OR TEST ITEM TO BE TESTED BY TEST ENGINEER.
INFORMATION TO BE GOT FROM DEVELOPER TO USE FBTA ON TEST SCENARIO OR TEST ITEM TO BE TESTED IS:-
A)HAS DEVELOPER USED "FLAG"(FLAG USED-FU) ANSWER "YES";"NO"
B)DEVELOPER USED FOLLOWING FLAG CONTENT (FLAG CONTENT-FC) ANSWER "BINARY"(PASS OR FAIL;1 OR 0;TRUE OR FALSE);TRINARY(0 OR 1

OR 2);INTEGER(0;1;2;3-----N)
BASED ON THE INFORMATION GOT FROM FU AND FC WE CAN USE FBTA TECHNIQUE TO DRAFT TEST CASES FOR ITEM TO BE TESTED OR RESPECTIVE TEST SCENARIO.