You may be planning to develop a big website or atiendas virtuales in the near future and hence may have started searching for a web application company that can help you deliver your intended goal. One may however get confused figuring out the best web application company as all of them may be claiming to offer quality work. You would easily note that there tend to be big difference on both the quality of the project as well as the price charged for the same. It is due to such reasons that you would need to take your time before approaching any of the web application companies. It would be wise to make sure that you not only have a business plan or the business itself but also a marketing strategy. In that case, you would have an easier time making sure that the design of the project perfectly meet your needs.
You may also consider having a budget with which you plan to work with to achieve the desired results. You would need to make sure that you do not mix up issues. You would need to make sure to exclude the budget from the business costs. It would also be wise to investigate the software the web application company is planning to use in building of your project. You would need to focus on one that breaks down the cost for you such that you perfectly understand what charges will be done on performing what task.
It would also be wise to focus on ensuring that you understand the cost of running the website the moment it is up and fucntioning. Again, the company ought to take you through the list of probable costs you would have to meet. Among the aspects you would need to consider include the maintenance, support, SSL certificate, e-mail hosting and hosting in a VPS. It would be wise to focus on having a plan that will pinpoint every cost going to the project in question. You would consider coming up with frames and tasks supposed to guide the engineer as he or she works on the project in question. At this phase, you would need to come up with a rough sketch which should be based on the detailed use cases as well as the user personas. One would also need to inquire about whether it is a material and time contract as well as the project management software used by the company in question.
Some web application company offer solutions which consist of ERP, POS, CRM, POS, Points of Sale, Billing or facturacion , Accounting, Inventory, Virtual Stores and more.
You can also read an article about wed application development here: https://en.wikipedia.org/wiki/Web_application_development