The application of improvement methods in the manufacturing industry has proven to be a valuable feature of continuous improvement activities. To establish whether the same is true in the construction sector, a survey was conducted to assess the current level of use and the perceived importance of such methods in both the U.K. and in Mexico. Following a broad review of the literature, various improvement tools, techniques and methods were recognized and grouped using affinity diagrams. A questionnaire was designed to collect the information and served as a basis for comparison. The results of the survey showed that, in terms of use, computer networks, laws and regulations, teams and teamwork, inspection and planning software were common practice in the U.K. while computer networks, customer satisfaction surveys, design software, Gantt charts and laws and regulations were commonly used in Mexico. A similar set of methods were perceived as highly important except that inspection and planning software were replaced by customer satisfaction surveys and customer complaints, respectively, in the case of the U.K. companies and Gantt charts by inspection in the case of Mexico. When comparing the mean use and the mean perceived importance for each method in both countries, significant differences were found mainly in the use of those for gathering and organizing customer needs, those aimed at planning and controlling quality and those for technology.Before considering the different methods that could be applied in the industry, construction projects and processes will be defined. There are two categories of construction projects: building and civil engineering 4 . While the former refers to the construction, enhancement and maintenance of both residential and nonresidential buildings, the latter is concerned with the construction of an infrastructure, for example roads, bridges and dams.At the beginning of the 1990s, Hughes 14 analysed more than five different sources in which the construction process was divided into stages. He recognized a variety of decision points, for example inception, feasibility analysis, contract, etc. More recently, various approaches have been adopted by the industry, such as designbuild, design-bid-build and construction management at risk 15 . Nevertheless, in this paper the traditional five stages reported by Austen and Neale 16 based on recognized international practice will be adopted to explain the construction process. These five stages are briefing, designing, tendering, construction and commissioning. The process usually works as follows.• Briefing. A client approaches an architect and sets the objectives of the project. • Designing. The architect develops a plan which is passed onto engineers to design.Since it is well known that the response rate for postal surveys is low 39 , follow-up letters were sent to both the U.K. and the Mexican companies in an attempt to increase it. In the event, 72 replies or 24% were received from the U.K. but only 16 or 5.3% from Mexico. While the former...