If your log source is in the marketplace, you're not paying for parser work.

Cortex XSIAM ships hundreds of detection rules already mapped to MITRE ATT&CK and tuned by Palo Alto Networks against telemetry from across their customer base. The work in week one is enabling the right ones, not authoring from scratch.

When a deployment SOW prices six weeks of rule tuning, half of that scope is reading the OOTB ruleset, deciding which to enable, and toggling them on. That work is genuinely valuable, but it is hours, not weeks. The other half, customizing rules to your environment specific noise, is real engineering and worth your partner full rate.

The trap is letting both halves get billed at the same engineering rate. Your team sees a six-week scope, assumes it is all custom work, and pays accordingly.