1. CIPS. (2018). Commercial Contracting L4M3 Course Book. Profex Publishing Limited.
Page 156
Section 6.2: Discusses Service Level Agreements (SLAs)
stating
"An SLA is a negotiated agreement between customer and supplier... It will set out the service to be delivered
the performance standard required... and the remedies available to the customer if the supplier fails to meet the standard." This supports the need for terms to be mutually agreed (negotiated) and documented (set out).
Page 160
Section 6.3: Explains that remedies for breach of contract (such as failing to meet KPIs) must be specified within the contract itself. This reinforces the principle of documentation.
2. Lysons
K.
& Farrington
B. (2020). Procurement and Supply Chain Management (10th ed.). Pearson.
Chapter 21
'Managing contracts and supplier relationships'
p. 534: Emphasizes that performance measures (KPIs) and any associated rewards or penalties should be "agreed with the supplier and incorporated in the contract." This directly supports both mutual agreement and documentation. The text highlights that this collaborative approach is essential for effective supplier relationship management.