This thread is for discussing the lifecycle document "Functional and timing ECOs before tape-out: procedure".
How a fix or improvement is put into a design after RTL freeze without restarting the implementation flow. A functional engineering change order patches the netlist and layout to match corrected RTL, and a timing ECO resizes, buffers or reroutes to close timing. This procedure sets out the steps, roles, records and approval levels, and how the flow differs across lifecycles.
Read the document: https://www.thesemiconhub.com/lifecycle/documents/procedures/eco-pre-tapeout
Point out anything that is wrong, unclear or missing, and say which section you mean. Reviewers read this thread when they audit the document.