This study explores the design of an NEC4 ECC contract by selecting Z clauses along with contract features. It also compares the payment and dispute resolution methods between NEC4 ECC contracts and FIDIC contracts. The NEC4 ECC contract is designed to enable project collaboration and innovation in the construction industry. It offers various options for pricing and payment, as well as shared financial risks between the contractor and the client. The study highlights the importance and benefits of using the NEC4 ECC contract for managing construction projects.