Dynamic process for adaptive tests

• US 9,885,751 B2
• Filed: 12/03/2015
• Issued: 02/06/2018
• Est. Priority Date: 12/03/2015
• Status: Active Grant

• Current Assignee: Optimal Plus Ltd. (Emerson Electric Company)
• Original Assignee: Optimal Plus Ltd. (Emerson Electric Company)
• Inventors: Rousseau, Eran, Peltz, Arie, Teplinsky, Shaul
• Primary Examiner(s): Alphonse, Fritz
• Application Number:
  US14/958,462
• Publication Number:
  US 20170160342A1
• Time in Patent Office: 796 Days
• Field of Search: 714726, 714728, 714732
• CPC Class Codes: G01R 31/3172 Optimisation aspects, e.g. using functional pin as test pin, pin multiplexing
• CPC Class Codes: G01R 31/31725 Timing aspects, e.g. clock distribution, skew, propagation delay for tester hardware G01R31/31937
• CPC Class Codes: G01R 31/3177 Testing of logic operation, e.g. by logic analysers
• CPC Class Codes: G01R 31/31907 Modular tester, e.g. controlling and coordinating instruments in a bus based architecture

Abstract

A method for modifying the execution sequence of tests for testing an object on a test system. The tests include a group of tests that is a candidate for replacement. The method includes: while executing the tests according to the execution sequence and before executing the group of tests, modifying, in real time, the execution sequence including: executing a delay instead of the group of tests, wherein the delay is related to the group of tests.

Claims

1. A method for modifying an execution sequence of tests for testing an object on a test system;

the tests include a group of tests that is a candidate for replacement, the method comprising;

while executing the tests on the test system according to the execution sequence and before executing the group of tests, modifying, in real time, the execution sequence, said modification including;

executing, by the test system, a delay instead of the group of tests, such that the group of tests is not executed in the execution sequence, and

wherein the delay is related to the group of tests.

2. The method according to claim 1, wherein said modifying the execution sequence includes:

receiving in the test system an indication to execute the delay related to the group of tests and to not execute the group of tests.

3. The method according to claim 1, wherein a test flow is augmented by a computer system before the execution of the tests by inserting the delay related to the group of tests, for selectively executing either the delay or the group of tests, and

wherein, modifying the execution sequence includes:

at least one of (i) receiving in the test system an indication to not execute the group of tests, and (ii) receiving in the test system an indication to execute the delay.

4. The method according to claim 1, wherein remaining tests in the execution sequence are not logically dependent on the group of tests.

5. The method according to claim 1, wherein the group of tests serves at least as a time buffer for settling time after previous tests in the execution sequence.

6. The method according to claim 1, wherein the tests include at least one other group of tests that is a candidate for replacement, and wherein said modifying the execution sequence includes executing at least one other delay instead of the at least one other group of tests, wherein the at least one other delay is related to the at least one other group of tests.

7. The method according to claim 1, wherein the object is a semiconductor chip.

8. The method according to claim 1, wherein execution of the delay reduces the risk of instability arising from the removal of the group of tests.

9. A method for providing an indication to a test system to modify an execution sequence of tests for testing an object on the test system;

the tests include a group of tests that is a candidate for replacement;

comprising, by a computer system associated with the test system;

while the tests are being executed by the test system according to the execution sequence,

if it is determined that the group of tests is not to be executed, obtaining a delay related to the group of tests, and

before the group of tests is executed, providing the indication to said test system to modify in real time the execution sequence of the tests for executing the delay instead of the group of tests, and for not executing the group of tests.

10. The method according to claim 9, wherein the at least one of the delay and the group of tests is determined by the computer system based on one or more rules.

11. The method according to claim 9, wherein the delay is shorter than an execution duration of the group of tests related thereto.

12. The method according to claim 9, wherein the delay is set to a default value.

13. The method according to claim 9, wherein the delay is set at least partly based on an input received by the computer system.

14. The method according to claim 9, wherein the delay is set at least partly based on estimated settling time.

15. The method according to any one of claim 9, wherein the delay is set at least partly based on the execution duration of the group of tests.

16. The method according to claim 9, wherein the delay is set at least partly based on properties of tests that precede said group of tests.

17. The method according to claim 9, wherein the delay is set at least partly based on historical performance of tests that follow after said group of tests.

18. The method according to claim 9, wherein the delay is set at least partly based on calibration data for the test system.

19. The method according to claim 9, wherein the delay is set at least partly based on simulation data.

20. The method according to claim 9, further comprising:

in response to said provision of indication, the test system executing the delay instead of the group of tests.

21. The method according to claim 9, wherein the tests include at least one other group of tests that is a candidate for replacement, and wherein said indication to modify the execution sequence is provided for executing at least one other delay instead of the at least one other group of tests, wherein the at least one other delay is related to the at least one other group of tests.

22. A method for providing an indication to a test system to modify an execution sequence of tests for testing an object on the test system, the tests including a group of tests that is a candidate for replacement:

comprising, by a computer system associated with the test system;

(i) obtaining the group of tests;

(ii) receiving from the test system a first indication that a test flow is loaded;

(iii) augmenting the test flow by inserting the delay related to the group of tests for selectively executing either the delay or the group of tests and providing the augmented test flow to the test system;

(iv) while the tests are being executed by the test system according to the execution sequence,

if it is determined that the group of tests is not to be executed, obtaining a delay related to the group of tests, and

before the group of tests is executed, providing the indication to said test system to modify in real time the execution sequence of the tests for executing the delay instead of the group of tests.

23. The method according to claim 22, further comprising:

in response to said provision of indication, said test system executing said delay instead of said group of tests.

24. The method according to claim 22, wherein the tests include at least one other group of tests that is a candidate for replacement, and wherein said augmentation of the test flow further includes inserting at least one other delay related to the at least one other group of tests for, with respect to any other delay and related other group of tests, selectively executing either the other delay or the other group of tests.

25. The method according to claim 24, wherein said indication to modify the execution sequence is provided for executing the at least one other delay instead of the at least one other group of tests.

26. A computer system for providing an indication to a test system associated therewith to modify an execution sequence of tests for testing an object on the test system;

the tests include a group of tests that is a candidate for replacement, the computer system being configured to perform, including;

while the tests are being executed by the test system according to the execution sequence,

if it is determined that the group of tests is not to be executed, obtaining a delay related to the group of tests, and

before the group of tests is executed, providing the indication to said test system to modify in real time the execution sequence of the tests for executing the delay instead of the group of tests, and for not executing the group of tests.

27. The computer system according to claim 26, further comprising:

in response to said provision of indication, said test system being configured to execute said delay instead of said group of tests.

28. The computer system according to claim 26, wherein the tests include at least one other group of tests that is a candidate for replacement, and wherein said indication to modify the execution sequence is provided for executing at least one other delay instead of the at least one other group of tests, wherein the at least one other delay is related to the at least one other group of tests.

29. The computer system according to claim 26, wherein the test system is associated with the computer system by utilizing an Application Programming Interface (API).

30. The computer system according to claim 29, being configured to provide said indication to the test system through the API.

31. The computer system according to claim 26, wherein the computer system includes a first computer system and a proxy computer system and wherein the test system is associated with the computer system by utilizing the Proxy computer system.

32. The computer system according to claim 31, wherein said first computer system being configured to provide said indication to the test system through the proxy computer system.

33. A computer system for providing an indication to a test system associated therewith to modify an execution sequence of tests for testing an object on the test system;

the tests include a group of tests that is a candidate for replacement, the computer system being configured to perform, including;

(i) obtaining the group of tests;

(ii) receiving from the test system a first indication that a test flow is loaded;

(iii) augmenting the test flow by inserting the delay related to the group of tests for selectively executing either the delay or the group of tests and providing the augmented test flow to the test system;

(iv) while the tests are being executed by the test system according to the execution sequence,

if it is determined that the group of tests is not to be executed, obtaining a delay related to the group of tests, and

before the group of tests is executed, providing the indication to said test system to modify in real time the execution sequence of the tests for executing the delay instead of the group of tests.

34. The computer system according to claim 33, further comprising in response to said provision of indication, said test system being configured to execute said delay instead of said group of tests.

35. The computer system according to claim 33, wherein the tests include at least one other group of tests that are candidates for replacement, and wherein said augmentation of the test flow further includes inserting at least one other delay related to the at least one other group of tests for, with respect to any other delay and related other group of tests, selectively executing either the other delay or the other group of tests.

36. The method according to claim 33, wherein said indication to modify the execution sequence is provided for executing the at least one other delay instead of the at least one other group of tests.

37. The computer system according to claim 33, wherein the test system is associated with the computer system by utilizing an Application Programming Interface (API).

38. The computer system according to claim 37, being configured to receive said first indication from the test system and to provide said indication to the test system through the API.

39. The computer system according to claim 33, wherein the computer system includes a first computer system and a proxy computer system and wherein the test system is associated with the computer system by utilizing the Proxy computer system.

40. The computer system according to claim 39, wherein said first computer system being configured to receive said first indication from the test system through the proxy computer system, and wherein said first computer system being configured to provide said indication to the test system through the proxy computer system.

41. The computer system according to claim 33, being configured to augment the test flow of the tests including specifying said delay as a slot.

42. A computer program product comprising a non-transitory computer useable medium having computer readable program code embodied therein for providing an indication to a test system to modify an execution sequence of tests for testing an object on the test system;

the tests include a group of tests that is a candidate for replacement the computer program product comprising;

computer readable program code for causing the computer system, while the tests are being executed by the test system according to the execution sequence,

if it is determined that the group of tests is not to be executed, obtaining a delay related to the group of tests, and before the group of tests is executed, providing the indication to said test system to modify in real time the execution sequence of the tests for executing the delay instead of the group of tests, and for not executing the group of tests.

43. A computer program product comprising a non-transitory computer useable medium having computer readable program code embodied therein for providing an indication to a test system to modify an execution sequence of tests for testing an object on the test system;

the tests include a group of tests that is a candidate for replacement the computer program product comprising;

computer readable program code for causing a computer system to obtain the group of tests;

computer readable program code for causing a computer system to receive from the test system a first indication that a test flow is loaded;

computer readable program code for causing a computer system to augment the test flow by inserting the delay related to the group of tests for selectively executing either the delay or the group of tests and providing the augmented test flow to the test system;

computer readable program code for causing the computer system, while the tests are being executed by the test system according to the execution sequence,

if it is determined that the group of tests is not to be executed, obtaining a delay related to the group of tests, and

before the group of tests is executed, providing the indication to said test system to modify in real time the execution sequence of the tests for executing the delay instead of the group of tests.