On the Kalinganagar (Odisha) steel plant, he said it is one of the largest greenfield industrial projects undertaken in India in recent years.
"Each of our group companies is charting its own strategy and growth story, with the focus on sustainable, profitable growth," he said in an in-house interview on the company's website.
Each of these companies has identified critical factors that make them sustainable over a longer time horizon, he added.
Similarly, the main factors underpinning sustainability in each company would be different, he explained.
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Mistry's comments come even as the Mumbai-based steel maker has posted a net loss for the third consecutive quarter in April-June period.
The steel major's consolidated net loss widened 10 times to Rs 3,183 crore in the April-June quarter of 2016-17 compared to Rs 317 crore in the year-ago period.
On Kalinganagar plant, Mistry said: "This is indeed one of the largest greenfield industrial projects undertaken in India in recent years and includes several engineering firsts for the country's steel industry. About 49,000 workers were mobilised at the peak of construction in 2015."
Further about 50,000 cubic metre per month of concrete was poured for ten consecutive months, possibly the highest in India. Phase 1 of the project, for 3 million tonnes (MT), has been set up at a cost of Rs 25,000 crore, including needed infrastructure for full 6 MT capacity, he added.
He further said: "The experience has taught us a lot in terms of carrying out large-scale, transformative projects."
Mistry said Tata Steel in 2004 decided to set up another steel making facility as part of its long-term strategy to expand in India, which continues to be a growth market for the steel industry.
The chief of the over USD 100 billion Tata Group said
"There were significant challenges and hurdles in land acquisition and possession of the government-owned land in Kalinganagar for several years," he said.
An independent study in mid-2012 assessed a huge cost overrun and over a year's delay in completion, among multiple issues identified, Mistry revealed.
"Of the total project work, only 11 per cent construction had been completed by then. The first task before me was to strengthen the team leading the project and then put in place clear governance and robust review processes," he said.
"A closer working relationship with our principal contractors allowed the early sighting of warnings on likely issues and the finding of solutions," he added.
The apex governance mechanism included setting up a specific board committee dedicated to reviewing the project. Frequent reviews helped pull back some of the cost and time overruns, Mistry noted.