I think those were very good points mentioned by cs22 and msc52njit-edu. Although I do agree that it can be more beneficial in the long run to delay the project in order to fully resolve an issue, I do think that in some scenarios where the company is developing a new technology and speed to market is critical to the success of the project, a significant delay may render the project useless, and in cases like these it may be appropriate to increase the project risk in order to keep the project on track. However, when this is the case, it is very important that the team understands exactly what the risk is to the project, and not only that, they need to be have a plan in place to handle the additional risk.