ALMOST ALL DEFECTS ARE CAUSED BY HUMAN ERRORS. HOWEVER, THERE ARE AT LEAST TEN KINDS OF HUMAN ERRORS.
1. FORGETFULNESS: WHEN WE ARE NOT CONCENTRATING
2. ERRORS DUE TO MISUNDERSTANDING WE MAY JUMP TO THE WRONG CONCLUSION BEFORE WE ARE FAMILIAR WITH THE SITUATION EXAMPLE STEP ON BREAK
3. ERRORS IN IDENTIFICATION MIS JUDGE A SITUATION EXAMPLE MISTAKE A $10 FOR A $1 BILL
4. ERRORS MADE BY AMATEURS: LAKE OF EXPERIENCE NEW WORKER MAY MAKE A MISTAKE
5. WILLFUL ERRORS: WE DECIDE THAT WE CAN IGNORE RULES
CROSS A STREET AGAINST A RED LIGHT
6. INADVERTENT ERRORS: SOMETIMES WE ARE ABSENTMINDED AND MAKE MISTAKES WITHOUT KNOWING HOW THEY HAPPENED.
7. ERRORS DUE TO SLOWNESS
8. LACK OF STANDARDS
9. SURPRISE ERRORS MALFUNCTIONS WITHOUT WARNING
10. INTENTIONAL ERRORS CRIMES AND SABOTAGE
MISTAKES HAPPEN FOR MANY REASONS, BUT ALMOST ALL CAN BE PREVENTED IF WE TAKE THE TIME TO IDENTIFY WHY AND WHEN THEY HAPPENED AND THEN TAKE STEPS TO PREVENT THEM BY USING POKE-YOKE METHODS AND SAFE GUARDS SUCH AS TRAINING, STANDARDIZATION, DISCIPLINE, ATT
