Comprehensive and Detailed Explanation From Exact Extract:
The future growth envelope refers to the anticipated growth trajectory of a service, including expected load, user demand, data volume, and performance requirements. Planning for this growth is essential to ensuring that a service can scale reliably without violating SLOs.
The Site Reliability Engineering Book, in discussions on capacity planning, states:
“A key element of capacity planning is estimating future demand so that systems can scale to meet user needs without sacrificing reliability.”
The SRE Workbook reinforces this concept:
“Understanding expected growth enables teams to design systems that scale and remain reliable as usage increases.”
Having the growth envelope defined enables:
Proper capacity planning
Avoiding resource exhaustion
Ensuring scalability before it becomes a reliability problem
Designing architectures that can handle future load
Why the other options are incorrect:
A Signed artifacts relate to supply chain security, not scaling.
C SLO/SLI reviews do not require growth envelope analysis.
D Error budgets relate to reliability thresholds, not capacity forecasting.
Thus, B is the correct answer.
[References:, Site Reliability Engineering Book, “Capacity Planning”, SRE Workbook, “Load and Capacity Management”, ]
