Here we would like to draw your attention to S_ALR_87013540 transaction code in SAP. As we know it is being used in the SAP PS-IS (Information System in PS) component which is coming under PS module (Project Systems).S_ALR_87013540 is a transaction code used for Forecast in SAP.
It comes under the package KAP1.
SAP S_ALR_87013540 menu path
See the possible menu paths to access the same report by avoiding entering the transaction code.
Information Systems → Project System → Financials → Costs → Plan-Based → Hierarchical → Forecast
Information Systems → General Report Selection → Controlling → Projects → Costs → Plan-Based → Hierarchical → Forecast
Transaction S_ALR_87013540 technical data table