Hi All,
If you ask zero defect is achievable or not? my answer would be "Yes". As rightly said by Reena and Vastupal, with high quality assurance at the time of project start and effective planning makes the zero defect possible.
Again, if you ask me zero defect at the very normal or affordable price is achievable, then answer is no. It is achievable only with high cost involving technology & tools like Mistake proofing, standard work,etc, will helps us detect defects, correct it and send it to customer.
Zero defect is again possible, if Perfection is achieved through constant practice. For eg, In surgical set up, a senior most doctors out of practice, he is able to achieve perfection in surgeries that they do.
Zero defect is achievable in a way we perceive things. Zero defect is something that doing the things first time right.
Hence, in a practical situations and theoretically zero defect is not possible. and if high cost is involved in detecting and correcting defects then, zero defect is possible. simply to say, it depends on the situation we want to explore.