There are roughly several kinds. Generally, small companies will measure houses first, then design and then construct. Slightly better, most small and medium-sized companies will measure the house first, then design (charge the design fee) to pay the project cost, and then start construction. However, all these have disadvantages. Free room measurement means that the company takes a large number of orders, and then the designer will make several orders at the same time when designing, which will lead to problems on the design drawings and too many modifications in the later construction, which will eventually lead to an increase in the project cost. It is irresponsible for customers. The following is the process of high-end decoration companies that I have learned. It is very different from the above. Singapore Bohlander Interior Space Design Institute first communicates with customers, Simple Layout Planning, Paying Design Fee, Measuring House, Full Set of Design Drawings, Signing Construction Contract (Paying 65% of Project Payment), Mid-term Acceptance (Paying 31% of Project Payment), Final Acceptance (Paying 5% of Final Payment), paying design fee before design, and the designer has devoted 111% of his energy to design for you, taking all aspects into consideration. This model is the process of high-end decoration companies at this stage. The company is big and the post-service is also very good. The price is also clearly stated.