Explanation
Account Based Forecasting and Sales Agreements are two Manufacturing Cloud functions that should be configured to have a complete picture of both run-rate and net-new business. Account Based Forecasting allows you to forecast your sales revenue based on the account level, rather than the opportunity level. This gives you more visibility into the demand from your existing customers, as well as the potential from new customers. Sales Agreements allow you to manage the sales lifecycle of your long-term contracts with customers, including pricing, volumes, and order realization. This helps you to track and fulfill your run-rate business, as well as to identify and capture new business opportunities within your agreements. References: Forecast Your Run-Rate and New Business with Account-Based Forecasting - Salesforce Help, [Create and Work with Sales Agreements - Salesforce Help]

According to the Salesforce Manufacturing Cloud documentation, the 'Delete sales agreement' profile permission allows users to delete an active, approved, canceled, or expired sales agreement. However, they can only delete a sales agreement if it doesn't have any active orders associated with it. Only users with this permission will see the 'Delete' option on the sales agreement record header. Account owners or other users without this permission will not see the 'Delete' option. The status of the sales agreement does not affect the ability to delete it, as long as there are no active orders1. Reference: 1: Delete a Sales Agreement - Salesforce

Explanation
Tableau CRM for Manufacturing is a set of prebuilt dashboards and datasets that provide insights into sales performance, account health, and sales agreement compliance. To ensure that users only see the data they are authorized to access, Tableau CRM for Manufacturing uses security predicates to filter the data based on the user's profile and permissions. One of these security predicates is:
Use Manager Hierarchy: This predicate filters the data based on the user's position in the manager hierarchy. Users can only see the data for themselves and the users below them in the hierarchy. This predicate uses the ManagerId field on the User object to determine the hierarchy.
References: : [Tableau CRM for Manufacturing Security Predicates]

n: A sales agreement is a contract between a manufacturer and a customer that specifies the terms and conditions of a long-term sales relationship. A sales agreement consists of a sales agreement record and one or more sales agreement products. A sales agreement product is a line item that represents a product or a product category that the customer agrees to purchase over a period of time. A sales agreement product schedule is a subcomponent of a sales agreement product that defines the quantity and revenue expectations for each time period within the sales agreement term. To load data into sales agreements, you must follow the correct data load sequence to ensure data integrity and avoid errors. The data load sequence is as follows:
First, load the sales agreement records, which contain the basic information about the sales agreement, such as name, account, start date, end date, status, and so on.
Second, load the sales agreement products, which are related to the sales agreement records by the Sales Agreement ID field. Each sales agreement product must have a valid product or product category, name, initial planned quantity, and price book entry.
Third, load the sales agreement product schedules, which are related to the sales agreement products by the Sales Agreement Product ID field. Each sales agreement product schedule must have a valid period, quantity, and revenue. Reference: Sales Agreement, Sales Agreement Product, Sales Agreement Product Schedule, Data Load Sequence for Manufacturing Cloud