title: Truck factor > We calculate the Truck Factor for 133 popular GitHub applications, in six languages: JavaScript (22 systems), Python (22 systems), Ruby (33 systems) , C/C++ (18 systems), Java (21 systems), and PHP (17 systems). > > […] > > To calculate the truck factor, we use a greedy heuristic: we consecutively remove the author with more authored files in a system, until more than 50% of the system’s files are orphans (i.e., without author). We are considering that a system is in trouble if more than 50% of its files are orphans. > > *[Truck-Factor](http://mtov.github.io/Truck-Factor/)* ([cache](/david/cache/2c8d94b5bcf14c7ea7a09208f80241bf/)) Quid sur vos projets professionnels ? Et sur leurs dépendances ? Il serait intéressant de pouvoir le décliner facilement, je suis [déçu de ne pas trouver les sources sur le dépôt du projet](https://github.com/mtov/Truck-Factor/issues/2)…