(M) Sdn Bhd [2010] 8 CLJ 629 has set out the function of the Court in an application for Judicial Review and the correct test to be applied in reviewing findings of fact made by the Industrial Court, to be as follows: “[15] …… Historically, judicial review was only concerned with the decision making process where the impugned decision is flawed on the ground of procedural impropriety. However, over the years, our courts have made inroad into this field of administrative law. Rama Chandran is the mother of all those cases. The Federal Court in a landmark decision has held that the decision of inferior tribunal may be reviewed on the grounds of "illegality", "irrationality" and possibly "proportionality" which permits the courts to scrutinize the decision not only for process but also for substance. It allowed the courts to go into the merit of the matter. Thus, the distinction between review and appeal no longer holds. 5 [16] The Rama Chandran decision has been regarded or interpreted as giving the reviewing court a license to review without restrain decisions for substance even when the said decision is based on finding of facts. However, post Rama Chandran cases have applied some brakes to the courts' liberal approach in Rama Chandran. The Federal Court in the case of Kumpulan Peransang Selangor Bhd v. Zaid Mohd Noh [1997] 2 CLJ 11 after affirming the Rama Chandran decision held that there may be cases in which for reason of public policy, national interest, public safety or national security the principle in Rama Chandran may be wholly inappropriate. [17] The Federal Court, in Petroliam Nasional Bhd v. Nik Ramli Nik Hassan [2003] 4 CLJ 625, again held that the reviewing court may scrutinise a decision on its merits but only in the most appropriate of cases and not every case is amenable to the Rama Chandran approach. Further, it was held that a reviewing judge ought not to disturb findings of the Industrial Court unless they were grounded on illegality or plain irrationality, even where the reviewing judge might not have come to the same conclusion. [18] The Court of Appeal has in a number of cases held that where finding of facts by the Industrial 6 Court are based on the credibility of witnesses, those findings should not be reviewed (see William Jacks & Co (M) Sdn Bhd v. S Balasingam [1997] 3 CLJ 235, National Union of Plantation Workers v. Kumpulan Jerai Sdn Bhd (Rengam) [2001] 1 CLJ 681, Quah Swee Khoon v. Sime Darby Bhd [2001] 1 CLJ 9, Colgate Palmolive (M) Sdn Bhd v. Yap Kok Foong & Another [2001] 3 CLJ 9. However, there are exceptions to this restrictive principle where: