Hello,

Is this what you mean?

"In traditional civil law, it is often stated that certain obligations are "obligations of result" while others are "obligations of means." A transport contract might be an obligation of result, since the carrier is paid a set sum for conveying a person or an object to a certain place by a certain time and the party engaging the services of the carrier really doesn't care how it's done. Non-arrival of the package or person would be considered a contract breach and, to be exculpated, the carrier would presumably have to demonstrate an act of God. Other contracts, notably professional services contracts, impose on the professional an "obligation of means." For example, a surgeon does not guarantee a surgery's result but merely undertakes to use appropriate means to achieve the desired end. Failure of the surgery is not by itself a breach of contract."