© Edward Stull 2018
Edward StullUX Fundamentals for Non-UX Professionalshttps://doi.org/10.1007/978-1-4842-3811-0_30

30. Waterfall, Agile, and Lean

Edward Stull1 
Upper Arlington, Ohio, USA

White lights give way to virtual sunrises deep within Norway’s longest tunnel. Located between the southwestern municipalities of Lærdal and Aurland, 15 miles of underground roadway gently unfurls beneath the unspoiled landscape of fjords and mountainsides.1 The Lærdal tunnel stands as an engineering triumph. Two and a half million meters of Precambrian gneiss rock were drilled, exploded, excavated, and removed. Two hundred thousand bolts2 secure its walls. However, the tunnel’s most remarkable attribute is its surprising psychology—a psychology befitting ...

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