Yes. It's always worked for me. Internally I might be panicking, thinking how on earth can I get this done? when given a new major requirement or something we've never done. When you break it down though, there are only ever one or two novel aspects. You can easily assess the nub of what you need to achieve with those. The rest is just breaking it down, to things you've tackled plenty - and smiling and looking in control even when super stressed....