1. CIPS L4M3 Commercial Contracting Study Guide (2018)
Chapter 5: Performance Management. The guide emphasizes the use of the SMART framework for setting objectives and KPIs. It states that targets must be 'Achievable' and 'Realistic'
meaning they should be attainable given the available resources and constraints. A one-hour international delivery target directly violates these principles. (Specific reference: Section on 'SMART objectives').
2. Lysons
K.
& Farrington
B. (2020). Procurement and Supply Chain Management (10th ed.). Pearson. In Chapter 15
"Supplier Relationship Management
" the authors discuss performance measurement
stating that "KPIs should be realistic and attainable... Unrealistic targets will only serve to demotivate the supplier" (p. 431). This directly supports the reasoning that the proposed targets are inappropriate.
3. Locke
E. A.
& Latham
G. P. (2002). Building a practically useful theory of goal setting and task motivation: A 35-year odyssey. American Psychologist
57(9)
705–717. https://doi.org/10.1037/0003-066X.57.9.705. This foundational academic work on goal-setting theory demonstrates that for goals to be motivating
they must be perceived as attainable. Goals that are impossible to achieve do not lead to higher performance.