Recruitment is a strategic pillar for any organisation. There are various models and approaches for attracting, assessing and hiring talent. However, the industry jargon can be confusing, particularly when it comes to terms such as outsourcing, headhunting and insourcing.
In this article, we provide a comprehensive glossary of recruitment terms, accompanied by a comparison table to help you choose the model that best suits your organisation.
Discover the definitive personnel selection dictionary. Learn what BPO, Outsourcing, Headhunting, Insourcing, and other key terms mean with clear definitions to optimize your hiring processes:
1) Personnel selection
It is the process through which a company identifies, evaluates, and hires candidates to fill job vacancies. It includes stages such as recruitment, interviews, psychometric testing, and reference checks.
The entire selection process is carried out by the company's own Human Resources department. From job posting to final hiring.
Advantages:
Disadvantages:
2) Outsourcing
It is the externalization of business processes to a third party. In personnel selection, it involves delegating recruitment and employee hiring to an external company.
The client organization only intervenes in key decisions.
Advantages:
Disadvantages:
3) BPO (Business Process Outsourcing)
A type of outsourcing where specific business processes are subcontracted (for example, personnel selection, customer service, or finance). BPO can include both internal and external processes.
Entire business functions are externalized, such as selection, payroll, or customer care. It is a more structural approach.
Example: A multinational subcontracts its entire selection and personnel administration area in Latin America.
Advantages:
Disadvantages:
4) RPO (Recruitment Process Outsourcing)
A subcategory of BPO focused exclusively on the recruitment process. A specialized company partially or fully manages the selection process on behalf of the client.
Example: A hotel chain hires an RPO to fill 200 vacancies during high season.
Advantages:
Disadvantages:
5) Headhunting
It is the active and personalized search for high-level candidates, generally for executive or highly specialized positions. Headhunters directly contact professionals who are not actively seeking employment.
Advantages:
Disadvantages:
6) Insourcing
It consists of internally managing personnel selection processes using the company's own resources, such as the Human Resources department.
Advantages: Greater control, deep knowledge of the business.
Disadvantages: More time and resources required.
7) Externalización
General term referring to delegating any process to third parties, including personnel selection. It includes modalities such as outsourcing, BPO, or RPO.
8) Staffing
Process of assigning the right personnel to the right tasks; it can include temporary or permanent hiring. Staffing agencies usually cover personnel needs quickly.
9) Interim Management
Consists of hiring executives on a temporary basis to manage a specific project, a transition, or a crisis within the company.
10) Selection consulting
Services offered by specialized companies that help design and execute talent attraction and selection strategies.
11) ATS (Applicant Tracking System)
Software used to manage the recruitment process, from receiving CVs to hiring. It allows task automation and improves efficiency.
12) Talent Acquisition
Strategic approach to attract and hire talent aligned with the organization's long-term goals. It includes recruitment, employer branding, and talent pipeline.
Below is a comparison table of personnel selection models:
| Model / Term | Managed by | Type of personnel | Level of control | Estimated cost | Ideal for... |
| Insourcing | Internal (own HR) | All | High | Medium/High | Companies with structured HR |
| Outsourcing | External company | All | Medium/Low | Low | Cost savings, high turnover |
| BPO | External company | Operational/Admin | Low | Low/Medium | Repetitive processes |
| RPO | Specialized company | All | Medium | Medium | Optimizing recruitment processes |
| Headhunting | External consultant | Executives/Directors | High | High | Key roles, scarce profiles |
| Staffing | Employment agency | Temporary | Medium | Medium | Quick coverage of vacancies |
| Interim Management | External consultant | Temporary executive | Medium | High | Crises, transitions, new projects |
| Selection Consulting | Consulting firm | All | Medium | Medium/High | Designing selection strategies and processes |
Choosing between outsourcing, insourcing, or headhunting depends on several factors:
Understanding the different recruitment models is key to making strategic decisions in talent management. Whether you opt for insourcing, RPO, headhunting, or staffing, each approach has specific advantages that can help you optimize your resources and improve the quality of hired personnel.
This recruitment dictionary is designed so that business owners, HR directors, and human talent professionals can gain clarity on these concepts and make informed decisions.
Use this glossary as a reference tool and strengthen your hiring strategy!
At Ambit Iberia, we have been offering outsourcing and headhunting services across all sectors for over 20 years, helping companies grow with flexible, efficient, and human solutions. We take care of the entire process (selection, training, and coordination), always looking after people, because outsourcing with us means trusting a team that puts business as much as talent at the center.