TABLE 1. Design Requirements for the Modular Adaptable Prosthetic Socket.

Criteria Description	Target Specification	Final Design
Length Adjustment	40–100% residual limb length	Achievable with multiple exterior panels
Prosthesis Interface	Compatibility with Bento Arm [21] and mechanical elbow1	Criterion met, potential for broader compatibility
Electrode Integration	4 electrodes; flexibility for integration of feedback devices	Up to 7 electrodes; feedback not yet explored
Electrode Placement	4 muscle sites	7 muscle sites
Cost	$500	$125
Fitting Time	<30 minutes	15 min initial fitting; <5min re-don after adjusted to fit
Mass	<1 kg	800g
Static Axial Load Limit	30 N	60 N
Rotational Load Limit	2	3
Comfort	Comfortable over the course of a research trial (3 hours)	Comfortable for up to 3 hours (user-reported)
Sanitation	Non-porous, cleanable interface surface with limb	All limb-socket interfaces neoprene-lined

¹ErgoArm plus, Otto Bock Inc., Germany