Tangible User Interfaces workshop:
Design Challenge Exercise B

This page describes results from one of three design challenges considered in the afternoon session of the CHI 2007 workshop on Tangible User Interfaces in Context and Theory.

Design Question:

"Process Instructions Conveyed on Aircraft Parts: the 'Stay-out' Problem"
(introduced by Wendy Leung and Anthony Majoros, Boeing)

Tangible User Interfaces

Background to the Question:

In the aerospace manufacturing industry, there is a problem called the Stay-out Marking Problem that tangible user interfaces may help solve. 'Stay-outs' are small areas that are marked on aircraft skin (the outer surface of the aircraft fuselage or wing) to encircle specific locations. The locations within the marked areas are those where holes for fasteners (usually rivets) are planned, but where the actual drilling operation must be delayed or postponed until a later step in the manufacturing process. The reason for delaying hole drilling even though blueprints call for holes is that some additional part is planned such that it will line up over or behind the hole location. Therefore, if the additional part is first set in place (with clamps) and then both the skin and additional part are drilled through in one operation, the holes will be--by definition--perfectly aligned. If, on the other hand, the hole in the skin is first drilled and then the hole in the additional part is drilled in a separate operation, the part may not align perfectly on its intended position. The challenge is marking or identifying stay-outs so mechanics never drill a stay-out hole before it should be drilled.

Discussion Notes: