# Planning Calibration - [Functions](https://brenkel-solutions-eg.gitbook.io/demandplus+/english/planning-calibration/planning-calibration/functions.md) - [Lines](https://brenkel-solutions-eg.gitbook.io/demandplus+/english/planning-calibration/planning-calibration/lines.md) - [Inventory Costs](https://brenkel-solutions-eg.gitbook.io/demandplus+/english/planning-calibration/planning-calibration/inventory-costs.md): The inventory costs are calculated for each period of the planning calibration. They are the basis for calculating the reorder quantities. - [Period lines](https://brenkel-solutions-eg.gitbook.io/demandplus+/english/planning-calibration/planning-calibration/period-lines.md): The period lines are separate planning calibrations for each individual usage period of the planning calibration. - [Usage Period Templates](https://brenkel-solutions-eg.gitbook.io/demandplus+/english/planning-calibration/planning-calibration/usage-period-templates.md): The intention of usage period templates is, that the user does not have to enter all usage periods for each planning calibration, but instead can use templates. - [Fields](https://brenkel-solutions-eg.gitbook.io/demandplus+/english/planning-calibration/planning-calibration/fields.md) --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://brenkel-solutions-eg.gitbook.io/demandplus+/english/planning-calibration/planning-calibration.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.