Stephen Elop, a candidate to replace Steve Ballmer as Microsoft’s chief executive officer, would consider breaking with decades of tradition by focusing the company’s strategy around making the popular Office software programs like Word, Excel and PowerPoint available on a broad variety of smartphones and tablets, including those made by Apple and Google, said three people with knowledge of his thinking. Elop would probably move away from Microsoft’s strategy of using these programs to drive demand for its flagship Windows operating system on personal computers and mobile devices, said the people, who asked not to be identified because the 49-year-old executive hasn’t finalized or publicly discussed his analysis of the business. Most of Microsoft’s software has been tied to running on Windows.