There is no « internal evaluation system » within each of these categories (e.g. B « serious breach of warranty »). This is a breach of a warranty. This is not a minor violation of a condition. It is a violation of a condition). Any breach is either breach of warranty, condition or non-maturity. When an infringement occurs or is alleged, one or both parties may wish to have the contract applied on its terms or attempt to obtain financial damage caused by the alleged infringement. Most contracts end when both parties have fulfilled their contractual obligations, but it is not uncommon for one party not to fully honor its contract termination. Infringement is the most common reason why contractual disputes are brought to justice for settlement. Suppose that R. Runner has entered into a contract with Acme Anvils for the purchase of some of its products for delivery until the following Monday evening. If Acme delivers the Anvils to Runner the following Tuesday morning, his breach of contract would likely be considered negligible and R. Runner would likely not be entitled to any cash damages (unless he can prove that he was harmed in some way by the late delivery).
Economically, the costs and benefits of maintaining or breaching a contract determine whether either party has an economic incentive to breach the contract. If the expected net costs to a party as a result of the breach of a contract are lower than the costs expected for the performance of a contract, that party has an economic incentive to breach the contract. Conversely, if the cost of performing the contract is lower than the cost of breaching the contract, it is a good idea to respect it. Whereas the fundamental offence was once the test of a serious infringement to justify termination, it is no longer so. The test is the one set out above for an offending offence. The concept of fundamentally breach as an autonomous legal concept no longer has legal force.  It is now only another term of the contract (if used) which must be interpreted as any other duration of the contract. If you enter into a contract, there is no way to completely prevent a breach, as you cannot control the actions of the other party.
That doesn`t mean you can`t reduce your risk. A breach of a guarantee of a contract creates a right to compensation for the damage suffered by the infringement. These « minor » offences do not entitle the innocent party to terminate the contract. The innocent party cannot sue the late party for a given service: only damages. Injunctions (a particular performance is a kind of injunction) to hold a new breach of security are likely dismissed on the basis that (1) the injunctions are a margin of appreciation and (2) damages are an appropriate remedy in the circumstances of the case. « refund », as a contractual agreement, means that the non-injuring party is put back in the situation it was in before the breach, while the « termination » of the contract invalidates the contract and relieves all parties of any obligation arising from the contract. . . .