BHSL had the certification of ISO 2009: 2015 – Quality Management System in 2018. BSI, Kolkata conducts surveillance audit every year.  In order to stay abreast of any changes of ISO compliance and requirements; and to review and assess the subject knowledge about ISO, BSI conducted a 4 days online training to the Lead, Auditors from March 13 to March 16, 2023 and two days vis-à-vis training to internal auditors by Mr. Sauvik Banerjee, BSI Group, Kolkata from 21^st March to 22^nd March 2023. Being a manufacturing industry, quality of products of BHSL is of the utmost important and therefore implements the requirements of ISO 2009: 2015 religiously.