In today’s competitive business environment, understanding exactly how time is spent on various tasks can make the difference between profitable operations and wasteful processes. A time study is a systematic method of analyzing work activities to determine the most efficient way to complete a task. This comprehensive guide will walk you through the process of conducting an effective time study that can transform your operational efficiency.
Understanding the Fundamentals of Time Study
A time study is a direct and continuous observation technique where a trained observer uses a timing device to record the time taken to accomplish a specific task. Originally developed by Frederick Winslow Taylor in the late 19th century, this method has evolved into a sophisticated tool used across industries to improve productivity, establish standard times, and optimize workforce utilization. You might also enjoy reading about How to Calculate and Interpret the Coefficient of Determination (R-Squared) in Data Analysis.
The primary objective of conducting a time study is to establish a baseline for how long tasks should take under normal working conditions. This baseline becomes invaluable for scheduling, cost estimation, workforce planning, and identifying opportunities for process improvement. You might also enjoy reading about DMADV: A Lean Six Sigma Approach to Designing High-Quality Processes and Products.
Step 1: Select the Task to Study
Begin by identifying which task or process requires analysis. Focus on tasks that are repetitive, consume significant resources, or have potential for improvement. High-volume operations, bottleneck processes, or tasks with customer complaints are excellent candidates for time studies.
For this guide, let us consider a practical example: a customer service department processing refund requests. This task involves multiple steps including verifying customer information, checking purchase history, obtaining approval, and processing the refund.
Step 2: Break Down the Task into Elements
Divide the task into smaller, measurable elements. Each element should have a clear beginning and end point. This breakdown allows for more accurate measurement and helps identify which specific portions of the task consume the most time.
For our refund processing example, the elements might include:
- Receiving and opening the refund request
- Verifying customer identity and account information
- Reviewing purchase history and transaction details
- Determining eligibility based on company policy
- Obtaining supervisor approval when necessary
- Processing the refund in the system
- Sending confirmation to the customer
Step 3: Prepare Your Observation Tools
Gather the necessary equipment for conducting your time study. You will need a reliable timing device such as a stopwatch, digital timer, or specialized time study software. Additionally, prepare observation sheets or spreadsheets to record your data systematically.
Create a data collection form with columns for observation number, element description, recorded time, rating factor, and notes. This structured approach ensures consistency and makes subsequent analysis more straightforward.
Step 4: Select and Inform the Workers
Choose workers who perform the task at an average pace with proper technique. Avoid selecting only the fastest or slowest workers, as this will skew your results. Select at least three to five different workers to observe, ensuring a representative sample.
Transparency is crucial for accurate results. Inform the workers about the purpose of the time study, explaining that the goal is to improve the process, not to criticize individual performance. This communication helps reduce anxiety and ensures workers maintain their normal working pace.
Step 5: Conduct the Observations
Position yourself where you can clearly observe the entire task without interfering with the worker’s normal routine. Use the continuous timing method, where the stopwatch runs throughout the entire observation, or the snapback method, where you reset the timer after each element.
Record each element’s time as the worker completes it. Conduct multiple cycles of observation for each worker. Industry best practice suggests at least 10 to 15 cycles per worker to ensure statistical reliability.
Sample Data Collection
Here is an example of collected data for our refund processing task across five cycles with one employee:
Employee A – Refund Processing Times (in seconds)
- Cycle 1: Receive request (12), Verify identity (45), Review history (67), Check eligibility (34), Get approval (89), Process refund (78), Send confirmation (23) = Total: 348 seconds
- Cycle 2: Receive request (15), Verify identity (42), Review history (71), Check eligibility (38), Get approval (92), Process refund (75), Send confirmation (21) = Total: 354 seconds
- Cycle 3: Receive request (11), Verify identity (48), Review history (65), Check eligibility (36), Get approval (87), Process refund (81), Send confirmation (25) = Total: 353 seconds
- Cycle 4: Receive request (14), Verify identity (44), Review history (69), Check eligibility (35), Get approval (90), Process refund (77), Send confirmation (22) = Total: 351 seconds
- Cycle 5: Receive request (13), Verify identity (46), Review history (68), Check eligibility (37), Get approval (88), Process refund (79), Send confirmation (24) = Total: 355 seconds
Step 6: Calculate the Average Observed Time
After completing all observations, calculate the average time for each element. Add the times for each element across all cycles and divide by the number of observations.
Using our example data for Employee A:
- Average time to receive request: (12+15+11+14+13)/5 = 13 seconds
- Average time to verify identity: (45+42+48+44+46)/5 = 45 seconds
- Average time to review history: (67+71+65+69+68)/5 = 68 seconds
- Average time to check eligibility: (34+38+36+35+37)/5 = 36 seconds
- Average time to get approval: (89+92+87+90+88)/5 = 89 seconds
- Average time to process refund: (78+75+81+77+79)/5 = 78 seconds
- Average time to send confirmation: (23+21+25+22+24)/5 = 23 seconds
Total average observed time: 352 seconds or approximately 5 minutes and 52 seconds per refund request.
Step 7: Apply Performance Rating
Performance rating accounts for the fact that the observed worker may work faster or slower than a normal pace. A trained observer assigns a rating factor, where 100% represents normal performance, above 100% indicates faster than normal, and below 100% indicates slower than normal.
If you rate Employee A at 105% (working slightly faster than normal), multiply the observed time by this rating factor: 352 seconds × 1.05 = 369.6 seconds.
Step 8: Add Allowances
Allowances account for legitimate delays such as personal time, fatigue, and unavoidable delays. Standard allowances typically range from 10% to 20% depending on the nature of the work.
For office work like refund processing, a 15% allowance is reasonable: 369.6 seconds × 1.15 = 425 seconds or approximately 7 minutes per refund request.
Step 9: Establish the Standard Time
The result after applying performance rating and allowances becomes your standard time. This represents the time a qualified worker should take to complete the task under normal conditions.
In our example, the standard time for processing a refund request is 7 minutes. This standard can now be used for capacity planning, performance evaluation, and identifying improvement opportunities.
Step 10: Analyze and Implement Improvements
Review your data to identify bottlenecks and inefficiencies. In our example, obtaining supervisor approval takes 89 seconds on average, representing the longest single element. Investigating this step might reveal opportunities such as implementing automated approval for refunds under a certain amount or streamlining the approval process.
Document your findings and recommendations in a clear report. Share this with relevant stakeholders and develop an action plan for implementing improvements. Set measurable targets and schedule follow-up time studies to verify that changes have achieved the desired results.
Common Pitfalls to Avoid
Several common mistakes can compromise the accuracy of your time study. Avoid conducting observations during atypical periods such as the first day after training or during unusually busy times. Ensure your sample size is statistically sufficient; too few observations will produce unreliable results. Maintain consistency in your observation technique across all workers and cycles.
Additionally, be aware of the Hawthorne effect, where workers alter their behavior because they know they are being observed. Minimize this by conducting observations over multiple days and maintaining a non-intrusive presence.
Leveraging Time Study Results
The data collected through time studies provides valuable insights beyond establishing standard times. Use this information to balance workloads across team members, identify training needs, justify staffing requests, estimate project costs, and support continuous improvement initiatives.
Organizations that consistently apply time study methodologies typically experience reduced operational costs, improved productivity, better resource allocation, and enhanced customer satisfaction through more predictable service delivery.
Take Your Skills to the Next Level
While this guide provides a solid foundation for conducting basic time studies, mastering advanced techniques requires comprehensive training. Time study is a core component of Lean Six Sigma methodology, which provides a structured approach to process improvement and waste elimination.
Through professional Lean Six Sigma training, you will learn sophisticated statistical analysis methods, advanced data collection techniques, and proven frameworks for driving organizational change. You will gain hands-on experience with industry-standard tools and earn recognized certifications that demonstrate your expertise to employers.
Whether you are looking to advance your career, improve your organization’s performance, or develop valuable analytical skills, Lean Six Sigma training provides the knowledge and credentials you need. Expert instructors will guide you through real-world case studies and practical applications, ensuring you can immediately apply what you learn to your workplace challenges.
Enrol in Lean Six Sigma Training Today and transform your approach to process improvement. Gain the skills to conduct comprehensive time studies, identify waste, streamline operations, and deliver measurable results. Join thousands of professionals who have advanced their careers through Lean Six Sigma certification. Visit our website or contact our training advisors to learn about upcoming courses and find the certification level that matches your goals. Your journey toward operational excellence begins with a single step.
