Every phase of the project life cycle is vital to the success of the project. However, certain parts of the life cycle can be a lot more crucial to the success of the project. In my opinion the executing phase is the most important aspect of the cycle. To be able to bring the medical device to the market it is imperative to test it in all variations and conditions. No stone should be left unturned during the execution phase. This could very well result in the product failing at later stages. To me the phase that can be the least important or crucial to the success of the medical device is the closing phase. All the hard work and regulation has been passed through the earlier stages. The closing phase is just there to tie everything together, there is not much pressure on this stage.