# Keeping Control in a Design and Build Factory Project > Stay in control in design and build: design sign-off points, written specifications, variations and regular updates. URL: https://factorybuilder.my/guide/design-and-build-control-variations/ Last-Modified: 2026-11-10 Tags: design and build risks for owners, design and build variations, design sign-off, specification control construction menu\_book Explainer // Design and Build Factory # Keeping Control in Design and Build: Approvals, Specifications and Variations Stay in control in design and build: design sign-off points, written specifications, variations and regular updates. Published 10 November 2026 · 5 min read ![Owner and site engineer reviewing finishes samples in an office block under construction](/images/featured/factory-owner-and-site-engineer-reviewing-finishes.webp) ## The Worry About Losing Control Control is the first worry owners raise about design and build, and it’s a fair one. If the contractor designs the building, will you still get what you want? Will quality slip to save money, and will changes become expensive surprises? At Factory Builder Malaysia, the factory and warehouse building arm of QDB Ventures Sdn Bhd (a Cheras-based contractor), we hear this at almost every first meeting. The real design and build risks for owners come from a loose setup, not from the method itself. ACPM Malaysia’s contract clarity guide says design changes and scope creep drive up to 20% of local building-project overruns and delays. That’s the problem the controls below are built to prevent. Our design and build [/design-and-build-factory/ →](/design-and-build-factory/) projects use four simple controls that keep the key decisions with you. Here’s what each one looks like in practice. ### Control 1: Design Sign-Off Points Design sign-off means you approve each design stage in writing before the next one starts. The design isn’t developed in one go and handed over at the end. It moves through four stages: - **Layout:** how production, storage, office and loading fit on the lot - **Elevations:** how the building and office frontage look - **Specification:** materials, finishes and key equipment - **Final design:** before the quotation and construction Nothing proceeds to the next stage without your approval. Timing matters here. FactoryHub’s 2026 guide to factory approvals says a new Selangor factory goes through about a dozen approvals in a fixed order, and building plan approval alone takes around 1.5 to 3 months. So lock the layout and elevations before plans go to the council, because a late change can cost you weeks as well as money. ![Marked-up specification document with sticky notes on a site table](/images/content/marked-up-specification-document-with-sticky-notes.webp) ### Control 2: Written Specifications A written specification is the exact description of what will be built, and once agreed, it becomes part of the contract. It covers roof and wall cladding, floor finish and loading, doors and shutters, office finishes and M&E systems. Quality is measured against it, so a clear specification protects you. Specification control in construction also covers items people often leave until late, such as fire protection. FactoryHub notes that Bomba requires an annual fire certificate for designated premises, such as a sprinklered single-storey factory of 2,001 m² or more. If your building could fall into that group, get the sprinkler and alarm scope written into the specification early. > **If it is not written down, it is not agreed** > > Verbal promises about brands or finishes are easy to forget. Put them in the specification. ### Control 3: How Variations Are Handled A variation is a written change to the agreed scope, and no changed work starts until you approve it in writing. Changes happen. You may add a mezzanine, change a machine, or move a loading bay. Each design and build variation follows the same four steps: | Step | What happens | | --- | --- | | 1. Request | You or the contractor propose the change | | 2. Assessment | Effect on cost, programme and approvals is set out | | 3. Agreement | You approve in writing | | 4. Work | Only then does the changed work proceed | This stops changes turning into disputes at the end. It also helps the quantity surveyor track the final account clearly. The written step carries legal weight too. The 2026 edition of Chambers’ Construction Law guide for Malaysia says the employer must follow the procedure in the contract for issuing and valuing variations, and the contractor must carry out variations that are validly issued. In plain terms, a quick WhatsApp “yes” on site may not protect either side. ### Control 4: Regular Communication Until Handover You should always know where the project stands. That means four things: - A main contact who answers your calls and messages - Regular progress updates - Site visits when you want them - A clear record of decisions Poor communication is one of the biggest complaints owners have about contractors. Both of our client testimonials mention how clearly the scope and design details were explained. ## Where the Money Fits Payments in design and build are usually made through progress claims tied to work completed, with retention held back until defects are made good. Our guide on factory progress payments [/guide/factory-progress-payments/ →](/guide/factory-progress-payments/) explains what to check in the payment schedule. Clear paperwork helps on both sides. DLA Piper’s 2025 overview of Malaysia’s Construction Industry Payment and Adjudication Act 2012 (CIPAA) explains that the Act’s fast-track adjudication applies to written construction contracts. Signed specifications and written variations make every claim easier to check against what was agreed. ## Control and Responsibility Together The strength of design and build is single responsibility: one party answers for both design and construction. The four controls make sure that responsibility comes with your decisions built in, which is how owners keep design and build risks manageable: - Sign off each design stage - Agree the specification in writing - Approve every variation before work starts - Stay informed until handover For the full sequence, read the design and build process [/guide/design-and-build-process-factory/ →](/guide/design-and-build-process-factory/) . If you own industrial land in Selangor, send us your lot details and rough layout, and we’ll walk you through the first sign-off stage. helpQuick answers ## Frequently Asked Questions ### Do I approve the design? expand\_more Yes. You sign off the design at agreed points, such as layout, elevations and specification, before engineering and construction move ahead. ### How are changes priced? expand\_more As written variations. The change, its cost and any effect on the programme are agreed in writing before the work proceeds. ### How will I be updated? expand\_more Through regular communication and feedback until handover, with a main contact and site progress updates. ### What if the contractor wants to change the specification? expand\_more Any change to the agreed specification should come to you in writing for approval, with the reason and the effect on cost and quality. menu\_bookKeep reading ## Related Guides ### How Progress Payments Work in a Factory Design and Build Contract How factory design and build payments are staged: progress claims, retention, liquidated damages and what to check. [How Progress Payments Work in a Factory Design and Build Contract →](/guide/factory-progress-payments/) ### The Design and Build Process for a Factory, Step by Step From brief to handover: plan and budget, design, engineering, quotation, approvals, construction and owner decisions. [The Design and Build Process for a Factory, Step by Step →](/guide/design-and-build-process-factory/) ### Design and Build vs Separate Architect and Contractor Design and build vs separate architect and contractor: responsibility, coordination, timing and when each suits. [Design and Build vs Separate Architect and Contractor →](/guide/design-and-build-vs-architect-and-contractor/) ### Have Industrial Land but No Drawings? How to Start a Factory Project Land but no drawings? What to gather, enquiring with details missing, and how a brief becomes a plan and design. [Have Industrial Land but No Drawings? How to Start a Factory Project →](/guide/industrial-land-no-drawings/) From guide to project ## Learn more about Design and Build Factory One contract covering design, engineering and construction for owners who have industrial land but no drawings yet. Every quotation lists inclusions, exclusions and responsibilities. View service [/design-and-build-factory/ →](/design-and-build-factory/) Request a Quotation [/contact/ →](/contact/)