A method for measuring the forces of a shrink film, the method comprising: providing a shrink film processing unit and a testing vehicle moveable within the shrink film processing unit, wherein the testing vehicle comprises a three-dimensional frame structure comprising length, width, and height dimensions, and a plurality of force sensors positioned at multiple separate sensor positions proximate an outer surface of the three-dimensional frame structure, wherein the plurality of force sensors are arranged at multiple separate sensor positions in order to measure forces in the direction of the length, the width, and the height dimensions of the three-dimensional frame structure, and wherein one or both of: one or more of the force sensors comprises a pin member which fits into a channel of the frame structure and is adapted to be pushed by an external force from the shrink film into a measurement cell (175, 176); or one or more of the force sensors is positioned on an outer face within a depression of a beam of the frame structure and has an actuator body which is adapted to be pushed down by an external force from a shrink film into a measurement cell; positioning a shrink film around the testing vehicle, wherein the testing vehicle is at least partially wrapped by the shrink film in a non-shrunken state; processing the wrapped testing vehicle by shrinking the shrink film around the testing vehicle as the testing vehicle moves through the shrink film processing unit; and measuring the forces applied by the shrink film on the testing vehicle with the force sensors at the multiple separate sensor positions during processing, after processing, or both. providing a shrink film processing unit and a testing vehicle moveable within the shrink film processing unit, wherein the testing vehicle comprises a three-dimensional frame structure comprising length, width, and height dimensions, and a plurality of force sensors positioned at multiple separate sensor positions proximate an outer surface of the three-dimensional frame structure, wherein the plurality of force sensors are arranged at multiple separate sensor positions in order to measure forces in the direction of the length, the width, and the height dimensions of the three-dimensional frame structure, and wherein one or both of: one or more of the force sensors comprises a pin member which fits into a channel of the frame structure and is adapted to be pushed by an external force from the shrink film into a measurement cell (175, 176); or one or more of the force sensors is positioned on an outer face within a depression of a beam of the frame structure and has an actuator body which is adapted to be pushed down by an external force from a shrink film into a measurement cell; one or more of the force sensors comprises a pin member which fits into a channel of the frame structure and is adapted to be pushed by an external force from the shrink film into a measurement cell (175, 176); or one or more of the force sensors is positioned on an outer face within a depression of a beam of the frame structure and has an actuator body which is adapted to be pushed down by an external force from a shrink film into a measurement cell; positioning a shrink film around the testing vehicle, wherein the testing vehicle is at least partially wrapped by the shrink film in a non-shrunken state; processing the wrapped testing vehicle by shrinking the shrink film around the testing vehicle as the testing vehicle moves through the shrink film processing unit; and measuring the forces applied by the shrink film on the testing vehicle with the force sensors at the multiple separate sensor positions during processing, after processing, or both.