Presentation-layer cost

Read the equation

Adds an inverse compression-ratio penalty and a weighted format cost. A larger compression ratio reduces the first term, but size reduction and fidelity must be considered separately.

Terms & definitions

The recovered passage does not supply a separate symbol table. Read the source context for the notation used in this version; familiar letters may carry different meanings in other builds.

How it works

1. Read Cost_6 as the quantity being defined or updated by this relation.

2. Substitute the source-defined variables or recorded values and follow the displayed arithmetic and indexing exactly.

3. Use this version’s variable definitions and update order. The same symbol may be assigned a different meaning in another build.

Assumptions & limits

Source recovery establishes that the expression appears in this record. Its mathematical validity, implementation behavior, and interpretation must be assessed separately. See the linked source and research notes for the checks available for this version.

Original context

Layer 5 — Session
\text{Cost}_5 = a_5(1-SS) + b_5 SE

Layer 6 — Presentation
\text{Cost}_6 = a_6(1/CR) + b_6 FC

Layer 7 — Application
\text{Cost}_7 = a_7 RT + b_7(1-SR)

Every layer solves the full global structure with its own cost function.

⸻

\text{Cost}_6 = a_6(1/CR) + b_6 FC

Related builds