The study is an attempt to identify if more industrial manufacturing units could be added to the existing list of sectors leading to PAT 'deepening'. This study aimed to explore the possibility of deepening the scope of energy savings by introducing more industrial units into PAT from within the existing cement, fertilizer, iron and steel, textile, pulp and paper and Chlor-Alkali sectors. It concludes that there are a large number of small-scale units which do not fall under the PAT criteria of notifying as DC. The analysis shows these savings could be huge at a unit level and also benefit the industry to become efficient and competitive through the enabling framework of PAT. The study, on the one hand, shows PAT deepening possibilities targeting energy savings in the industrial sector, and on the other hand, sends motivating signals to the individual units for improvement.