# Sourcing and Talent Pools: Measuring Recruiting Channels, Building a Pipeline > Which recruiting channels truly deliver, how a talent pool is built and maintained in compliance with DSGVO (General Data Protection Regulation), why employee referrals often go unused, and how recruitment agencies are managed. URL: https://techport.ai/en/hr-beratung/recruiting/sourcing-und-talentpools --- 1. [HR Consulting](/en/hr-beratung)/ 2. [Recruiting](/en/hr-beratung/recruiting)/ 3. Sourcing Channels and Talent Pools [Recruiting](/en/hr-beratung/recruiting) # Sourcing Channels and Talent Pools By Redaktion techport.ai, HR-Beratung · Last updated on 21 August 2026 Most companies know the cost of their job advertisements but not their return. They know that the advertisement on the major portal cost €1,200. They do not know that not a single one of the 60 applications from it led to a contract, while the three applications via employee referral resulted in two hires. Sourcing means managing channels by their return, not by habit. And it means engaging with people not only when a position is vacant, but maintaining a relationship until it becomes available. ## How you can tell * The channel mix has been the same for years because no one knows which channel delivers. * Rejected candidates from the second round, former student employees, and alumni disappear from view. * The referral programme exists, but the last bonus was paid out two years ago. * Recruitment agencies are commissioned ad hoc, under varying conditions, without success measurement. ## Why this happens Channel success can only be measured if the source of each application is recorded and tracked through to hiring. Many systems do this, but no one evaluates the data. Talent pools fail due to data protection concerns because it is unclear how long data may be stored, and due to maintenance issues because no one is responsible. Referral programmes die if they are not visible. ## Our approach 1. **Evaluate channels.** From your applicant tracking system, we extract applications, interviews, hires, costs, and retention after twelve months for each channel. The result is almost always surprising. 2. **Redistribute channel mix.** Budget is allocated where hires are generated. For hard-to-fill profiles, we define whether active sourcing, agencies, or the talent pool is the right approach. 3. **Build a talent pool.** We define who enters the pool, how consent is obtained, how long data is retained, and who maintains contact every six months. This is managed within the applicant tracking system, not in an Excel spreadsheet. 4. **Manage referrals and agencies.** The referral programme gets a digital process, visible rewards, and an evaluation. Agencies receive framework agreements, standardised conditions, and success measurement. ## What you gain * Your recruiting budget yields more hires without increasing in size. * Hard-to-fill positions start with candidates in the pool instead of from scratch. * Employees become your most effective channel because referring is easy and rewarded. ## From our projects Channel evaluation in our projects is the analysis with the greatest surprise effect: channels with the most applications are rarely those with the most hires, and employee referrals almost always lead in retention after twelve months. In practice, talent pools do not fail due to technology, but because no one is responsible for the six-monthly contact. Therefore, responsibility must be embedded in the process, not merely in a statement of intent. ## Good to know A talent pool requires its own legal basis. Storing applicant data beyond the recruitment process is only permissible with explicit consent, which can be revoked at any time and must be documented. We recommend a storage period of twelve to 24 months with an automatic reminder for renewal. Details can be found on our page regarding applicant data and DSGVO. ## Frequently asked questions How large must a talent pool be to be worthwhile? Even 50 well-maintained contacts in a bottleneck profile make a difference if they are approached twice a year. Size is less important than currency. Should we do Active Sourcing ourselves or outsource it? For three to five bottleneck profiles, in-house expertise is worthwhile. For rare executive-level appointments, specialist service providers are usually more cost-effective than building up internal capacity. ## Let's talk about Sourcing Channels and Talent Pools In a thirty-minute first call we clarify where your biggest lever is and whether we are the right partner for it. [Book a first call](/en/kontakt)[Our consulting](/en/so-funktionierts) ## Further reading [RecruitingApplicant Data and Data ProtectionHow long can applicant data be stored? Deletion concept between AGG (General Equal Treatment Act) deadlines and GDPR (General Data Protection Regulation), consent for talent pools, rights of access and the role of the applicant tracking system.](/en/hr-beratung/recruiting/bewerberdaten-dsgvo)[Strategy and PlanningEmployee Experience and Employer BrandShaping Employee Experience instead of leaving it to chance: Moments that matter, journey design across the lifecycle, measurement and the connection to Employer Branding.](/en/hr-beratung/strategie-und-planung/employee-experience)[RecruitingPersonnel Request and ApprovalThe requisition process as an underestimated time sink: reporting a need, reviewing, approving, advertising. How a digital workflow saves weeks and integrates workforce planning.](/en/hr-beratung/recruiting/personalanforderung)[KnowledgeHR MetricsDefinitions and formulas that read the same across the company.](/en/hr-beratung/kennzahlen)[KnowledgeHR GlossaryKey HR terms, briefly explained.](/en/hr-beratung/glossar) Back to the field [Recruiting](/en/hr-beratung/recruiting) ## Sources * [Regulation (EU) 2016/679 (GDPR), EUR-Lex](https://eur-lex.europa.eu/eli/reg/2016/679/oj) * [§ 15 AGG (General Equal Treatment Act), Compensation and Damages](https://www.gesetze-im-internet.de/agg/__15.html) Rt Written by [Redaktion techport.ai](/ueber-uns), HR-Beratung Mehr als 15 Jahre Erfahrung in HR-Prozessen und HR-Systemen, Einführung von HR-Software in mittelständischen Unternehmen, Verhandlung von Betriebsvereinbarungen zu IT-Systemen. This page reflects the position as at the date shown and does not constitute legal advice. For specific questions we work together with your legal advisers. 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