Context
At DTH, we wanted to experience our product exactly the way a customer would. The goal was to validate the effectiveness of the instructional content we
provide. The key question we aimed to answer was: How easy is it for a first-time user to follow our instructions (both video and text) while assembling the Vikas drone? To test this, a complete Vikas R&D Drone Kit was provided to a novice user, along with the assembly manual and video guides.
The Problem
- The motor fastener screws provided were slightly oversized (by 3 mm), making the issue difficult to detect during assembly.
- The problem only surfaced later during motor testing in QGroundControl, when errors appeared during the setup and calibration phase.
- As expected, troubleshooting began with the most obvious causes – potential motor damage, configuration errors, or software issues. However, two motors showed abnormal vibration and instability As an immediate fix, we replaced the two faulty motors.
Managerial Lens
- Damaged motors: When attempting to unscrew the motors, the incorrectly sized screws became embedded, damaging
the motors. - Misdiagnosis: Initially, the damage was attributed to user error rather than the underlying issue of incompatible screw size.
- Operational delay: Two out of four motors were damaged, preventing flight operations for the day.
A key takeaway is that the problem was not immediately apparent and required a more experienced technician to identify the subtle but critical discrepancy in screw sizing.
Technical Learnings
- Double-check screw sizes while packing each drone kit.
- Pack motor screw sets separately to avoid confusion.
- Add a simple QC checklist to catch such errors before shipping.
- Make sure instructions clearly show which screws to use and where.
Managerial Input
- Even a small difference (like 3 mm) can cause big problems.
- The real issue isn’t always obvious at first.
- Small details matter more than we think.
- It’s okay to make mistakes as long as we learn from them.
- Quickly identifying and prioritizing problems helps fix them faster and
better.
