How is it possible?

It is a good exercise to grab a cup of coffee / tea and then think about why projects comes trough in your organisation? Is it because of the project model? or the project manager? or the project schedule? No, probably not.

It is more likely the culture you have. There is often much more trial-and-error than you would think. Problems and challenges arise in the project, but becomes usually very quickly a disturbing sliver in the organization. More and more attention is paid to the sliver - more and more resources and competencies are used until the sliver is gone. It is precisely this fluctuating attention and help that project rarely see or underestimate the extent of. It is the many free longhours, it is the neglection of more important matters, it is the enthusiasm, the optimism, it is stubbornness and much much more.

The more mature with project you are in an organization, the more predictable are these efforts, and the more you can plan with them and manage them. In less mature organizations one must as with the bumble bee ask: ""How is it possible?".