The base-model rule
A base model is a design that already exists: its frame, seat build, cushion layout and proportions are drawn and have been made before. Its base price reflects that known design in its standard size and material. When you change the length, the depth, the arm style, the upholstery or another element, the price is revised to reflect the new materials, cutting and labour. Every change revises the price, even small ones, because each changes something in production. Standard products stay at base price, with stitch options only. SOISU does not publish prices; you receive a quote for the exact specification you approve.
What 'producible' means in plain terms
A change is producible when it can be made reliably without redesigning the piece. Stretching a sofa usually is, within the limits of the frame. Changing to a different fabric usually is, if the fabric suits the seat shape and stitching. Some requests are not producible on a given base model: a seat much deeper than the frame was designed for, a recliner mechanism in a frame not built to take it, or a shape that would leave seams where they will strain. When a request is not producible, the honest options are a different base model or a new design. A maker who agrees to everything without checking the structure is taking a risk with your furniture.
New designs and development cost
A completely new design is different from a change. It has to be drawn, its frame engineered, its patterns cut and its proportions checked, often through a sample. That work is development, and at SOISU a new design includes development cost in its price. It also takes longer, because the first piece is also the test piece. A new design makes sense when nothing in the range comes close to what the room needs, or when a designer has drawn a specific piece for a project. For most homes, adapting a base model reaches the goal faster.
Drawings, 3D and sign-off
SOISU offers home measurement, drawings, technical drawings and 3D visualisation. The drawing shows the piece with its dimensions; technical drawings add detail a designer or site team needs; 3D places the piece in your room so you can judge scale and colour before it is made. Before production, you sign the drawing and the specification. That signature is the reference point: what is on paper is what gets made. If you change your mind after signing, the drawing, specification and price are revised and signed again.
When a standard piece is the better choice
Choose standard when the base model already fits your room, when you need the piece quickly, or when you are unsure what to change. A standard piece has been made before, so you can sit on the exact thing you will receive. Ready pieces within Mumbai limits are typically delivered within 30–34 hours of payment, while custom pieces are made to a ready-by date written on the order. Many buyers find that one change, such as length, solves the problem and the rest can stay standard.