Objective: Translate your chosen signature product into a repeatable production plan: sub-assemblies, cut list, machine settings, and a time-and-cost estimate you can price from.
A sellable product is not sewn in one pass; it is assembled from sub-assemblies joined in a fixed order. 'Architecture' means deciding that order before you touch fabric so every unit comes out identical and nothing is sewn shut too early. Work in three layers. First, decompose: list the finished product's physical parts (for a zip pouch: outer shell, lining, zipper tab, optional pocket) and group construction into stages, where each stage produces a sub-assembly that later stages combine. Order stages so that detail work (topstitching, appliqué, pockets) happens while a piece is still flat and accessible, and closing seams happen last. Second, build a cut list: every piece, its cut dimensions including seam allowance, how many per unit, and the fabric or interfacing it comes from. This drives your materials budget — multiply quantities by your cost per yard plus notions (zipper, thread, interfacing) to get cost-of-goods per unit. Third, map each stage to the MC6650: stitch type and length, foot, needle position, feed-dog state, and whether you need the extension table or the knee-lift for pivoting. The MC6650's features matter here — use the needle up/down button so pivots at corners are precise, the automatic thread cutter to save seconds per seam across dozens of units, the adjustable presser-foot pressure for layered or slippery fabric, and feed-dog drop only if a stage needs free-motion. Finally, time each stage once with a stopwatch and sum it; add setup and pressing time. That total labor time, multiplied by your target hourly rate and added to cost-of-goods, is the floor for your price. Writing this down turns a one-off sample into a product you can reproduce and sell at a known margin.
Example: Signature product: lined zip pouch. Decomposition and stage order: (1) interface outer panels; (2) attach zipper to one outer + one lining panel, repeat for second side — straight stitch L2.5, zipper foot, needle up/down for pivoting; (3) topstitch along zipper — straight stitch L3.0, needle moved left; (4) open zipper halfway, align outer-to-outer and lining-to-lining, sew around perimeter leaving a turning gap in the lining bottom — L2.5, standard foot, auto thread cut at each corner stop; (5) turn, press, edgestitch the gap closed. Cut list: outer fabric 2 pieces 9x7 in (incl. 0.5 in SA), lining 2 at 9x7, fusible interfacing 2 at 8x6, one 9-in zipper. Budget: outer $1.10, lining $0.80, interfacing $0.35, zipper $0.90, thread $0.10 = $3.25 cost-of-goods. Timed build = 22 min; at $20/hr labor that's $7.33, so floor price ≈ $10.58 before markup.
Try it: Take your own signature product and write a one-page plan with three sections. Section A: list every sub-assembly and number the stages in build order, noting for each stage which MC6650 feature or setting it uses (stitch, length, foot, needle up/down, auto cut, feed dogs). Section B: a cut list table with piece name, cut size with seam allowance, quantity, and source material; total the materials into a cost-of-goods figure. Section C: sew or mentally walk one unit, time each stage, sum to a labor time, and compute a floor price using your chosen hourly rate plus cost-of-goods. Flag any stage that must happen before a closing seam.