Japanese transportation is well-known for its precision. For example, when a train runs more than five minutes late, the railway company will issue a delay certificate for its passengers to show their employers and teachers. In other words, Japanese transportation all but guarantees results. In business-to-business deals, this type of guarantee is enforced by a contract known as a service-level agreement.

Upon a recent visit, I was on a shinkansen reading the label in front of me. It explained that the free Wi-fi was provided on a best effort basis; the railway company would not guarantee its connection speed or quality. The company would not be responsible if your internet was compromised. Instead of guaranteeing results, the company would only try its best; nothing more.

It made me wonder: 

When I think about approaching more commitments with a best effort basis, I feel energized. What’s the reason for this? 

(Does it mean that, if I approached commitments with a best effort basis, I could also be comfortable with more commitments?)

What commitments in my life could I approach with a best effort basis?

What reasons would make a best effort basis not acceptable to family, friends, coworkers, employers, clients, and other people?

When is a best effort basis no longer interpreted in good faith? Or, more simply, what would cause someone to doubt that you’re putting in your best effort?