There are various services which we are providing in OpenERP 

Manufacturing

Engineering, bills of material, scheduling, capacity, workflow management, quality control, cost management, manufacturing process, manufacturing projects, manufacturing flow

Supply chain management

Order to cash, inventory, order entry, purchasing, product configurator, supply chain planning, supplier scheduling, inspection of goods, claim processing, commission calculation

Financials

General ledger, cash management, accounts payable, accounts receivable, fixed assets

Project management

Costing, billing, time and expense, performance units, activity management

Human resources

Human resources, payroll, training, time and attendance, rostering, benefits

Customer relationship management

Sales and marketing, commissions, service, customer contact and call center support

Data services

Various "self-service" interfaces for customers, suppliers, and/or employees

Access control

Management of user privileges for various processes