The timing of our sales and related customer contract fulfillment is difficult to predict. Many of our customers are large enterprises, whose purchasing decisions, budget cycles and constraints and evaluation processes are unpredictable and out of our control. Further, the timing of our sales is difficult to predict. The length of our sales cycle, from initial evaluation to payment for our products and services, can range from several months to well over a year and can vary substantially from customer to customer. Our sales efforts involve significant investment in resources in field sales, marketing and educating our customers about the use, technical capabilities and benefits of our products and services. Customers often undertake a prolonged evaluation process. As a result, it is difficult to predict exactly when, or even if, we will make a sale to a potential customer or if we can increase sales to our existing customers. Large individual sales have, in some cases, occurred in quarters subsequent to those we anticipated, or have not occurred at all. In addition, the fulfillment of our customer contracts is partially dependent on other factors related to our customers' businesses that are not in our control. As with the sales cycle, this can also cause revenues and earnings to fluctuate from quarter to quarter. Specifically, a significant number of our customers have cancelled or pushed back the delivery of pending product orders and/or delayed the start of scheduled theater refurbishing and construction projects. If our sales and/or contract fulfillment cycles lengthen or our substantial upfront investments do not result in sufficient revenue to justify our investments, our operating results could be adversely affected.
We have experienced seasonal and end-of-quarter concentration of our transactions and variations in the number and size of transactions that close in a particular quarter, which impacts our ability to grow revenue over the long term and plan and manage cash flows and other aspects of our business and cost structure. In addition, our operating results can vary from quarter to quarter as a result of seasonality in consumer spending and payment patterns. A large part of our business is concerned with new theater builds, which often see substantial delays due to weather, but also financing timing, permits and governmental delays, and other unpredictable problems often associated with large real estate projects. Also, our revenue growth generally is higher during the first and fourth quarters of the fiscal year as the weather improves, the digital cinema market becomes more active, and consumers begin new theater builds or remodels projects. During these periods, we tend to experience increased transaction volume. Conversely, our revenue growth generally slows during the second quarter of the fiscal year, as spending on new theater construction and theater improvement projects tends to slow leading up to the holiday season and through the winter months. As a result, growth in transaction volume also tends to slow during these periods. We expect this seasonality to continue for the foreseeable future, which may cause fluctuations in our operating results and financial metrics. However, our seasonality trends may vary in the future as we introduce products to new industry verticals, and we become less concentrated in the new theater construction and improvement sector. If expectations for our business turn out to be inaccurate, our revenue growth may be adversely affected over time, and we may not be able to adjust our cost structure on a timely basis and our cash flows may suffer.