Imagine you're walking along a country path and in front of you there is a gap. What can you do? Here's some ideas.
1. Turn back
2. Go around the gap
3. Fill the gap in
4. Walk through the gap
Relating these options back to projects can get people thinking and often provide more options that were not previously considered.
Turn back - When there is a gap in the project, one option is to simply turn back and not deal with the gap. Maybe the fact that there is a gap should be enough for you to realise that you've gone the wrong way, and it would be safer to simply not take that path.
Go around the gap - Another option would be to find a way around the gap. Maybe it would make sense to take a step or two to the side, then go forward? Avoiding the gap and doing things differently could be simpler and more effective than dealing with the gap.
Fill the gap in - Maybe the gap needs filling in. This will take some effort, as someone needs to find out more about the gap, find out what is missing, and then fill it in. This might be the best way forward, as if we avoid this gap, it might come back later and we'll have to deal with it once again.
Walk through the gap - It might be that the gap is smaller than it seems. Sometimes people are so afraid of gaps that they don't look at them long enough to see that they are only tiny and insignificant. Take a closer look, and if the gap isn't that important and isn't dangerous then simply walk through it.
You can probably relate to these, and there is probably one of them that makes more sense to you. People tend to have a default way of dealing with gaps and use the same approach time and time again. Having more options gives more flexibility. Keep this in mind next time you have a gap in one of your projects.