The recognition criteria in this Standard are usually applied separately to each transaction. However, in certain circumstances, it is necessary to apply the recognition criteria to the separat ely identifiable components of a single transaction in order to reflect the substance of the transaction. For example, when the selling price of a product includes an identifiable amount for subsequent servicing, that amount is deferred and recognized as r evenue over the period during which the service is performed. Conversely, the recognition criteria are applied to two or more transactions together when they are linked in such a way that the commercial effect cannot be understood without reference to the series of transactions as a whole. For example, an entity may sell goods and, at the same time, enter into a separate agreement to repurchase the goods at a later date, thus negating the substantive effect of the transaction; in such a case, the two transa ctions are dealt with together. Under IFRS 15, Revenue from Contracts with Customers (IFRS 15.2230) Factors that indicate that an entity’s promise to transfer a good or service to a customer is separately identifiable (in accordance with paragraph 27(b)) a) the include, but are not limited to, the following: (IFRS 15.29) entity does not provide a significant service of integrating the good or service with other goods or services promised in the contract into a bundle of goods or services that represent the combined output for which the customer has contracted. In other wo rds, the entity is not using the good or service as an input to produce or deliver the combined output specified by the customer. b) the good or service does not significantly modify or customize another good or service promised in the contract. the good or s ervice is not highly dependent on, or highly interrelated with, other goods or services promised in the contract. For example, the fact that a customer could decide to not purchase the good or service without significantly affecting the other promised good s or services in the contract might indicate that the good or service is not highly dependent on, or highly interrelated with, those other promised goods or services