Joining the debate on working hours, IT services company Capgemini India's chief executive Ashwin Yardi on Tuesday advocated 47.5 hours work per week, and was against sending e-mails to employees on weekends. He was speaking at Nasscom Technology and Leadership Forum (NTLF) here. "Forty seven and half hours. We have about nine hours a day and five days a week," Yardi said replying to a question on the ideal time to be put in by an employee per week. "My guiding principle for the last four years is don't send an e-mail on a weekend even if it is an escalation unless you know you can solve it on a weekend," he added. Acknowledging that sometimes he does work on weekends, Yardi said he desists from sending e-mails to employees, as there is no point just to give "grief" to an employee knowing well that the work cannot be done on a weekend. It can be noted that IT industry leader and Infosys co-founder N R Narayana Murthy has been pitching for a 70-hour work week, while EPC major Lars