Study design and data analysis

The design of our studies and the subsequent analyses are customised to suit the requirements of our clients and those of the regulatory authorities. We use state-of-the-art study designs and -statistical analysis, including:

  • Rigorous study designs (e.g. sufficient replication, sample size and randomisation), enabling  the meaningful application of (advanced) statistics 
  • Modelling that includes a set of fixed and random factors


Examples of advanced statistical analysis that we have applied in past studies include:

  • Logistic-exposure modelling (e.g. of nest survival in bird studies)
  • Cox proportional hazard regression modelling 
  • Modelling of chick development
  • GLMMs and beta-regression models
  • Minimum number alive (MNA) linear mixed modelling
  • Long-term viability of populations (≥ 3years)
  • Posteriori analyses of minimum detectable differences (MDDs)


We are currently working to establish ecological modelling services at tier3—keep an eye on our news page for future developments!


tier3 solutions GmbH Office

Kolberger Str. 61-63 | 51381 Leverkusen | Germany

Phone: +49 2171 55 997 0 | Fax: +49 2171 55 997 69 | E-mail: info|at|

Managing Director: Dr. Christian Wolf

Trade Register: Cologne HRB 70506 | VAT-No. DE 274 359 609