International Course on Engineering Surveying 2023 Diagnosis adjustment of planned networks as well as the analysis of existing geodetic networks by means of least-squares adjustment is a principal task in geodetic and metrological sciences such as surveying engineering. The network adjustment yields not only the estimated coordinates and the related fully populated dispersion but also parameters to evaluate the reliability of the network. At the 20th International Course on Engineering Surveying, the principles of geodetic network adjustment are recapitulated within the specific tutorial named network analysis. The conference will be held at ETH Zurich from April 11 to 14, 2023. The open source least-squares software package Java·Applied·Geodesy·3D is used to analyse local terrestrial networks, to interpret the adjustment results, and to evaluate network reliability. The principles of Baarda's DIA approach for detection, identification and adaptation of misspecified models are generalized and applied to evaluate network deformations. In complex analysis procedures, the network adjustment is only a cog in the wheel. For that reason, interfaces for data exchange and processing of adjustment results in external applications is addressed. Further information are available at the website of the Course on Engineering Surveying. JAG3D To get back the original order after sorting a table, the table model was replaced by a SortedList as suggest by the Java-API If a table is sorted, new entries are added at the sorted position Action listener added, to force saving text field values of group properties (useful when multiple groups are selected) JUniForm NumberFormatException is caught during import to ensure a more robust file import Clicking the button to show the a-priori dispersion matrix, the corresponding table row is selected Reset maximum tolerable bias table rows when readjusting, to avoid artifactual values in disabled points Like for JAG3D, a SortedList is used for the table model