Comprehensive and Detailed 150 to 250 words of Explanation From Workday Record-to-Report/Course Guide/topics:

The alternate supplier contract's accounting method determines how Workday accounts for its installment expense recognition. Alternate contracts allow the same underlying lease arrangement to be evaluated under different accounting standards, accounting methods, and book codes. Therefore, the IFRS 16 alternate contract must carry the accounting method that represents the IFRS treatment.

The original supplier contract remains the source for supplier invoices, but its accounting method does not override the accounting treatment assigned to the alternate contract. This separation is necessary because ASC 842 and IFRS 16 can produce different expense-recognition patterns. For example, IFRS 16 generally treats long-term operating leases as finance leases, resulting in interest and depreciation or amortization components rather than the single straight-line lease expense commonly associated with an ASC 842 operating lease.

The interest rate is an input used in present-value and interest calculations, but it does not independently select the accounting framework or expense-recognition methodology. Similarly, the original contract's type and accounting method govern the original contract's treatment, not the alternate contract's parallel accounting.

Consequently, Workday evaluates the accounting method assigned directly to the alternate supplier contract when generating the applicable installment expense-recognition accounting.

Official Workday reference: Workday Education - Lease Accounting ; topics: Alternate Supplier Contracts, Expense Recognition, and ASC 842 and IFRS 16.

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