In this report we discuss different types of ground-truth systems used for evaluation of object recognition and tracking systems in industrial manufacturing environments. We discuss four main ways of acquiring ground truth for object recognition and tracking: 1) physics-based simulation ground-truth systems, 2) manual annotation or labeling of ground-truth systems, 3) platform-based ground-truth systems, and 4) physically-based ground-truth systems. We also include a separate discussion of motion capture systems, a special case of physically-based ground-truth systems focused on human tracking. We discuss previous efforts and discuss the different physical quantities used for ground-truth systems. Currently, there are no solid, universal solutions for ground truth measurements for human and object detection and tracking. There are a number of partial solutions suitable for specific applications, with varying drawbacks.