The v4.1 redesign achieved tool-free serviceability, with disassembly workload reduction consistent across all measures and disassembly rated near-perfectly easy¶

Claim · All claims
Evidence · 1 study (2 entries) · design r2–r3 · q2
Currency · newest study 2026 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q2 i? Print-in-place latches gave tool-free access to the SD card and USB ports, tasks deemed impossible on v4 without full disassembly. → Farnaz Baksh 2026 q2 i? For disassembly, workload reduction was consistent across all measures, and Study 2 disassembly SEQ reached a near-perfect Very Easy mean. → Farnaz Baksh 2026 (2)

Evidence¶

Farnaz Baksh 2026¶

Farnaz Baksh, Matevž B. Zorec, Feiazie Baksh, and Karl Kruusamäe. (2026). Co-Creating Buildable and Open Social Robot Study Companions with University Students. https://arxiv.org/abs/2606.15239 doi:10.48550/arxiv.2606.15239

q2 · i? · design · r3

Study 1 qualitative debrief evidence from the four developers, coded against themes. The article reports participants confirmed the latches allowed "immediate access to the SD card and USB ports"; no effect size is printed.

"Participants confirmed that the print-in-place latches allowed immediate access to the SD card and USB ports, tasks deemed “impossible” on v4 without full disassembly."

Farnaz Baksh 2026 (2)¶

Farnaz Baksh, Matevž B. Zorec, Feiazie Baksh, and Karl Kruusamäe. (2026). Co-Creating Buildable and Open Social Robot Study Companions with University Students. https://arxiv.org/abs/2606.15239

q2 · i? · design · r2

Study 1 NASA-TLX and SEQ disassembly results across the four developers, reported descriptively in Table 3. The article states workload reduction was "consistent across all measures"; no test statistic or effect size is printed.

"For disassembly, workload reduction was consistent across all measures (Ta-ble 3, Fig. 3). SEQ scores reinforced this pattern, with v4.1 rated equal or easier than v4 for both tasks."

Discussion¶

Related Claims¶

• The v4.1 redesign reduced mean developer assembly time from 21.4 to 13.7 minutes, but the first-attempt-only mean was 20.4 minutes, with the further reduction reflecting a junior learning effect — related
• DfA/DfD-informed mechanical redesign of the RSC chassis raised developers' perceived usability from Poor (SUS 59.4) to Excellent (SUS 89.4) — related
• First-time builders completed the v4.1 build in a mean of 39.1 minutes with SUS 74.6 (Good), but showed higher assembly Mental Demand than developers and tactile fragility concerns around snap-fit components — related