SPRO related, you will require to check in SPRO --> GATP
For your reference I am providing Tcodes which is in the menu Path:
Advanced Planning and Optimization --> Global ATP -->
Backorder Processing
/SAPAPO/BOPI - Interactive Backorder Processing
/SAPAPO/BOP - Batch Backorder Processing
/SAPAPO/BOP_WORKLIST - Backorder Processing Worklist
/SAPAPO/BOP_COMPARE - Backorder Processing Comparison
/SAPAPO/BOP_MONITOR - Backorder Processing Monitor
/SAPAPO/BOP_RUNTIME - Backorder Processing Runtimes
/SAPAPO/BOP_RESULT - Backorder Processing Result
/SAPAPO/BOP_DELETE - Delete Backorder Processing
/SAPAPO/BOP_UPDATE - Update Backorder Processing
Global ATP --> Backorder Processing --> Parallelization
/SAPAPO/BOP_PARAINFO - Server Groups
/SAPAPO/BOP_PARAMNTR - Monitor
/SAPAPO/BOP_PARASTAT - Runtime Statistics
Global ATP --> Backorder Processing --> Event-Driven
Quantity Assignment (EDQA)
/SAPAPO/ODL - Process Order Due Lists
/SAPAPO/ODLR - Complete Order Due Lists
/SAPAPO/ODL_LOG - Display Change Log
/SAPAPO/EDQA - Processes of Event-Driven Quantity Assignment
/SAPAPO/EDQA_DEL - Delete Process Data
Global ATP --> Reporting
/SAPAPO/AC03 - Product Availability
/SAPAPO/AC42 - Product Allocations
/SAPAPO/DMP1 - Forecast
/SAPAPO/AC04 - ATP Simulation
/SAPAPO/SCHED_TEST - Simulation Scheduling
/SAPAPO/AC12 - Simulation Rounding
/SAPAPO/EDQA_OS - Overview and Simulation of EGMZ
Global ATP --> Environment --> Technical Monitors
/SAPAPO/AC05 - Time Series
/SAPAPO/AC06 - Temporary Quantity Assignments
/SAPAPO/ATPTUBE_DISP - Parameter Buffer
/SAPAPO/AC07 - Exclusive Lock Records
/SAPAPO/ATREE_DSP - ATP Tree Structures
Global ATP --> Environment --> Product Availability
/SAPAPO/AC08 - Generate Safety Stock Requirement
/SAPAPO/ATPCH01 - Maintain ATP Characteristic View
Global ATP --> Environment --> Product Allocations
/SAPAPO/ATPQ_CHKCHAR - Characteristic Combinations
/SAPAPO/ATPQ_COLLECT - Characteristics of Collective
Product Allocations
/SAPAPO/ATPQ_ALERT - Shortage Check
Global ATP --> Environment --> Third-Party Order Processing
/SAPAPO/TPOP_POREL - Convert Planned Purchase Orders
/SAPAPO/ATP_GCM - Condition Maintenance
Global ATP --> Environment --> Packaging Specification
/SCWM/PACKSPEC - Maintain Packaging Specification
/SCWM/PSWORKSTEP - Maintain Packaging Work Step
/SCWM/PSEG - Maintain Level Element Group
/SCWM/PSCT6 - Condition Maintenance
/SCWM/PSCT5 - Define Logical Conditions for Packaging
Specifications
/SCMB/15000024 - Define Master Data for Packaging Specifications
/SCWM/IPU - Initial Data Transfer of Packing Specifications
Global ATP --> Environment --> Application Log
/SAPAPO/ATPLOG_DEL - Delete Application Log
/SAPAPO/ATPLOG_DSP - Display Application Log
/SAPAPO/ATPLOG - Maintain Parameters for Application
Log
/SAPAPO/ATPCLOG_DEL - Delete C-Log Data
Global ATP --> Environment --> Current Settings
S_AP9_75000212 - Filter Type
S_AP9_75000206 - Sort Profile
S_AP9_75000183 - Special Sorting
/SAPAPO/VASOSORT - Variant-Dependent Special Sorting
S_AP9_75000184 - Generate Filter Type and Sort Profile
S_AP9_86000161 - Check Level
/SAPAPO/60000142 - Order Due Lists
For Rule maintenance you will require to follow:
Advanced Planning and Optimization --> Master Data
--> Rule Maintenance
/SAPAPO/RBA04 - Integrated Rule Maintenance
/SAPCND/AO11 - Create Rule Determination
/SAPCND/AO12 - Change Rule Determination
/SAPCND/AO13 - Display Rule Determination
/SAPCND/AO14 - Copy Rule Determination
Apart from the above transaction you will require to know R/3 related transactions also.
