(ShareCast News) - J Sainsbury chief executive Mike Coupe has laid out plans on how he intends to "reinvent the superstore" as he battles to reverse the retailer's falling sales.He said he was looking to make the overall shopping experience simpler, quicker and bring it up-to-date with the habits of the modern customer."Our challenge is to reinvent the superstore for the next generation, for the future," he told the Sunday Telegraph."If you characterise last year as building a plan and making sure we had the financial capacity to execute the plan, this year for us is all about experimentation and starting to understand how we can make our larger stores in particular different for the future."He explained that this would mean making the stores easier to get around, more convenient to shop in, greater use of technology, more non-food, "and perhaps increasingly other third parties utilising some of our space".He continued: "My measure of long-term success would be how and when we change the dynamic of our superstore business. We are certainly looking to push the boundaries of what we might do with those formats in the future."The main change he is exploring is how to make the large superstores to be more convenient."The challenge is to make the superstore more attractive in the first place, and then secondly easier to get around and get out of then previously," he explained.