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Technical

Time estimates as cost drivers  Logo cima

  Eddy Cardinaels & Eva Labro |   Free |   CIMA |   2009 |   Thought leadership

This research studies the determinants of measurement error in time-driven costing to obtain an observable true cost benchmark that can assess the error in a costing system. The first part of the study looks at the level of aggregation in the cost system’s definition of activities. The second part examines different task environments (job design) where tasks present themselves in a coherent or incoherent order. Part three looks at the notification that participants will need to provide time estimates after performing a set of activities, and finally there is an investigation into whether providing time estimates in percentages versus in absolute time units (e.g. minutes) has an effect on accuracy.

Topics covered:
  • Management accounting: Technical: Cost accounting & management: Cost accounting, Intermediate

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3 Comments/Reflections

George Rose

George Rose Jan 2023

The findings in the report are very interesting. Adopting the approach of notifying those who need to account for their time is a sensible as the findings of the research advise that this will focus minds on accounting for each task in terms of hours / minutes. Their is an advantage here in that those who are asked to account for their time organise their tasks in a more coherent manner, thus allowing a focused approach. 

I submit timesheets for the financial project accounting tasks I perform, with this in mind I will perform full tasks for each project prior to moving on to the next task. This lends itself to a more efficient workflow. "Idle time" is reserved for dealing with emails / queries and non-project related meetings.

Therefore, a time recording system where the reasons and benefits are communicated effectively to those expected to complete them is an effective tool for management accountants in that a more accurate understanding of the true cost of time taken is understood, as the recording of actual time will be more accurate than providing an estimation.
Susan Everitt

Susan Everitt Jan 2016

Interesting - wish I had read it years ago when doing more work with timesheets

Caroline Eisenhauer

Caroline Eisenhauer Dec 2015

Done