$1.$ ProTech Precision Sdn Bhd$,$ a Malaysian metal parts manufacturer for the aerospace industry, faces recurring defects and late deliveries. Audits reveal the root cause is weak leadership commitment and lack of structured quality improvement models. You are engaged to devise a Total Quality Management $($TQM$)$ framework tailored to their operations, integrating suitable models, approaches, and a plan to ensure strong leadership support for long$-$term success.

$($a$)$ Construct a comprehensive TQM framework for ProTech by integrating a suitable quality model and implementation approach.

$($b$)$ Formulate a leadership commitment strategy that ensures sustainable TQM implementation at ProTech.