Scoring procedures have to be precise and give uniform results indifferent to the scorer. Nevertheless, any scoring procedures are subjects to error. For example, hand scoring may bring to mistakes in counting answers or assigning points. When students make incorrect changes in answers or put any marks on the form, it can affect the machine scoring. Besides, essay’s scoring can be influenced by the fatigue level of the appraiser, the order in which the papers are assessed or students efforts at cheating.

Regardless of the type of the scoring procedure, it is always better to establish a grading key or use a standard set of rules for assigning points for each question. 
   
Design an objective and fair scoring method for the test questions that will be able to unsure accurate results, using the following guideline:
- Cover student’s name before the exam evaluation.
- Try to have every paper rescored by a second person. If you think it is unpractical, re-score a sample of the papers (like every 5 paper) to find out either additional re-scoring is necessary.
- Evaluate all the papers for one essay question as a group before going to the next question. It was discovered, that appraisers can be influenced by the student’s performance on an earlier questions.
- Set beforehand how to score papers with inessential information or extraneous mistakes like punctuation or grammar ones.
- Determine whether there is one best answer or multiple correct responses.
- Determine how many points it is possible to receive for each question.
- Decide either you will group scores into subgroups to provide information to students about how they scored in specific content areas.