1. Human Technology Group, Dept. of Electromechanical Engineering, University of Beira Interior, Calçada da Fonte do Lameiro, 6201-001 Covilhã, Portugal
2. TechnoServe Mozambique, Av. Zedequias Manganhela, 267, 5.° andar, Flat 6, Prédio JAT IV, Maputo, Mozambique
3. Dept. of Industrial and Systems Engineering, University of Wisconsin-Madison, 3270A Mechanical Engineering Building, 1513 University Avenue, Madison, WI 53706-1572, United States of America